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Commit ddbf3e4

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Rajeev Kumar Singh
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14 files changed

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‎.gitignore

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*.iml
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.idea

‎Readme.md

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## Golang Tutorials
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1. [Writing your first Go program](https://www.callicoder.com/golang-introduction-hello-world/)
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2. [Golang Variables, Zero Values, and Type inference](https://www.callicoder.com/golang-variables-zero-values-type-inference/)
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3. [Golang Basic Types, Operators, and Type Conversion](https://www.callicoder.com/golang-basic-types-operators-type-conversion/)
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4. [Working with Constants in Golang](https://www.callicoder.com/golang-typed-untyped-constants/)

‎tutorial1- hello-world/hello.go

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// My first Program
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package main
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import "fmt"
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func main() {
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fmt.Println("Hello, World")
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}

‎tutorial2-variables/type-inference.go

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package main
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import "fmt"
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func main() {
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// Type inference
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var name = "Rajeev Singh" // Type declaration is optional here.
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fmt.Printf("Variable 'name' is of type %T\n", name)
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//================================
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// Multiple variable declarations with inferred types
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var firstName, lastName, age, salary = "John", "Maxwell", 28, 50000.0
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fmt.Printf("firstName: %T, lastName: %T, age: %T, salary: %T\n",
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firstName, lastName, age, salary)
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}
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package main
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import "fmt"
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func main() {
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// Declaring Variables
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var myStr string = "Hello"
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var myInt int = 100
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var myFloat float64 = 45.12
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fmt.Println(myStr, myInt, myFloat)
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//================================
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// Multiple Declarations
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var (
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employeeId int = 5
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firstName, lastName string = "Satoshi", "Nakamoto"
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)
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fmt.Println(employeeId, firstName, lastName)
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//================================
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// Short variable declaration syntax
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name := "Rajeev Singh"
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age, salary, isProgrammer := 35, 50000.0, true
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fmt.Println(name, age, salary, isProgrammer)
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}

‎tutorial2-variables/zero_values.go

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package main
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import "fmt"
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func main() {
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var (
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firstName, lastName string
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age int
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salary float64
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isConfirmed bool
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)
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fmt.Printf("firstName: %s, lastName: %s, age: %d, salary: %f, isConfirmed: %t\n",
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firstName, lastName, age, salary, isConfirmed)
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}

‎tutorial3-basic-types/boolean_types.go

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package main
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import "fmt"
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func main() {
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var truth = 3 <= 5
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var falsehood = 10 != 10
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// Short Circuiting
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var res1 = 10 > 20 && 5 == 5 // Second operand is not evaluated since first evaluates to false
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var res2 = 2*2 == 4 || 10%3 == 0 // Second operand is not evaluated since first evaluates to true
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fmt.Println(truth, falsehood, res1, res2)
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}

‎tutorial3-basic-types/characters.go

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package main
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import "fmt"
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func main() {
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var myByte byte = 'a'
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var myRune rune = '♥'
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fmt.Printf("%c = %d and %c = %U\n", myByte, myByte, myRune, myRune)
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}
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package main
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import "fmt"
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func main() {
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var a = 3 + 5i
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var b = 2 + 4i
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var res1 = a + b
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var res2 = a - b
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var res3 = a * b
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var res4 = a / b
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fmt.Println(res1, res2, res3, res4)
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}

‎tutorial3-basic-types/integers.go

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package main
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import "fmt"
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func main() {
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var myInt8 int8 = 97
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/*
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When you don't declare any type explicitly, the type inferred is `int`
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(The default type for integers)
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*/
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var myInt = 1200
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var myUint uint = 500
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var myHexNumber = 0xFF // Use prefix '0x' or '0X' for declaring hexadecimal numbers
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var myOctalNumber = 034 // Use prefix '0' for declaring octal numbers
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fmt.Printf("%d, %d, %d, %#x, %#o\n", myInt8, myInt, myUint, myHexNumber, myOctalNumber)
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}

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