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Commit 1ae2e93

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Data_type_and_Control_statement
1 parent 918c5ac commit 1ae2e93

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{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "5f1c6f18",
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"metadata": {},
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"source": [
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"# Python Data type (int, float)\n",
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"# 파이썬 자료형 (정수, 실수)\n",
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"## Why 숫자형부터 시작?\n",
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"- 컴퓨터가 이해할 수 있는 단 하나의 언어: 기계어(machine language) with 0, 1\n",
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"\n",
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"## > 숫자형\n",
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"- 종류\n",
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" - 정수: 0, 양의 정수, 음의 정수\n",
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" - 실수: 소수점을 포함하는 숫자\n",
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" - 8진수 (0o or 0O로 시작): e.g. 0o34, 0o25\n",
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" - 16진수 (0x로 시작): e.g. 0x2A, 0xFF\n",
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" - 2진수 (0b로 시작): e.g. 0b10, 0b11\n",
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"- 8bit == 1byte"
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]
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},
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{
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"cell_type": "markdown",
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"id": "0efe7645",
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"metadata": {},
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"source": [
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"## 1) 정수형 (int)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"id": "b75439af",
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"metadata": {},
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"outputs": [],
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"source": [
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"#양수, 음수, 0\n",
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"a = 10\n",
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"b = -20\n",
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"c = 0"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"id": "8f5defd8",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"10\n"
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]
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}
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],
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"source": [
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"# 출력 함수 > print(변수명)\n",
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"print(a)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"id": "0a89e390",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"a\n"
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]
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}
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],
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"source": [
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"# print(string) > string \" \"안의 내용 출력\n",
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"print(\"a\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"id": "45799edc",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Hello world\n"
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]
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}
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],
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"source": [
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"print(\"Hello world\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 5,
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"id": "5f8abf86",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"int"
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]
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},
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"execution_count": 5,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"# data type을 확인하는 함수 > type()\n",
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"type(a)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 6,
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"id": "0a8e7079",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"int"
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]
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},
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"execution_count": 6,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"type(b)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 7,
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"id": "e3a2e75a",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"int"
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]
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},
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"execution_count": 7,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"type(c)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "42dfa06a",
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"metadata": {},
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"source": [
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"## 2) 실수형 (float)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"id": "683a7278",
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"metadata": {},
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"outputs": [],
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"source": [
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"# 실수 data type == float\n",
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"a = 1.3\n",
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"b = -2.4\n",
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"c = 0.0"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 9,
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"id": "12f5df76",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"float"
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]
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},
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"execution_count": 9,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"# 실수 타입 확인\n",
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"type(a)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 10,
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"id": "0ed54cb0",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"float"
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]
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},
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"execution_count": 10,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"type(b)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 11,
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"id": "eb030fb3",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"float"
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]
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},
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"execution_count": 11,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"type(c)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 12,
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"id": "a9a3c198",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"<class 'int'> <class 'float'>\n"
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]
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}
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],
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"source": [
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"# 0 vs 0.0\n",
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"print(type(0), type(0.0))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 13,
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"id": "298733c3",
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"metadata": {},
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"outputs": [],
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"source": [
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"# 정수와 실수가 다른 숫자로 인식되는 이유: 2의 보수(정수) vs floating point(실수)"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.9.12"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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{
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"cells": [],
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"metadata": {},
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"nbformat": 4,
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"nbformat_minor": 5
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}

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