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Commit 0fe8d2c

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feat: add Dsa Topic3
1 parent 7e4af60 commit 0fe8d2c

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1 file changed

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‎Topic3/index.js

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// for loop
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for (let i = 0; i < 23; i++) {
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console.log(i);
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}
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// Question: print n hello worlds
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for (let i = 1; i < 101; i++) {
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console.log(`${i} Hello World`);
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}
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// Question: One to n number and vice versa
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for (var i = 1; i < 10; i++) {
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console.log(i);
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}
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console.log(i);
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for (let i = 1; i <= 20; i++) {
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console.log(i);
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}
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// Question: Sum of n natural numbers
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let pr = prompt("kaha tak add karwaaoge ?");
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if (pr === null) {
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console.log("cancelled");
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} else {
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let n = Number(pr);
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if (isNaN(n)) {
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console.log("Invalid Input");
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} else {
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if (n > 0) {
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let sum = 0;
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for (let i = 1; i <= n; i++) {
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sum += i;
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}
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console.log(sum);
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} else {
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console.log("should be + & more than 0")
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}
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}
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}
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// Question: factorial
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let prompt = prompt("kaha tak add karwaaoge ?");
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if (prompt === null) {
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console.log("cancelled");
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} else {
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let n = Number(prompt);
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if (isNaN(n)) {
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console.log("Invalid Input");
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} else {
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if (n > 0) {
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let fact = 1;
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for (let i = 1; i <= n; i++) {
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fact *= i;
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}
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console.log(fact);
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} else {
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console.log("should be + & more than 0")
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}
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}
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}
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// Factors of number
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let pr1 = prompt("kaha tak add karwaaoge ?");
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if (pr1 === null) {
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console.log("cancelled");
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} else {
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let n = Number(pr1);
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if (isNaN(n)) {
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console.log("Invalid Input");
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} else {
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if (n > 0) {
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for (let i = 1; i <= Math.floor(n / 2); i++) {
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if (n % i === 0) {
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console.log(i);
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}
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}
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console.log(n);
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} else {
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console.log("should be + & more than 0")
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}
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}
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}
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// Question: Prime Number
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let pr2 = prompt("kaha tak add karwaaoge ?");
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if (pr2 === null) {
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console.log("cancelled");
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} else {
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let n = Number(pr2);
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if (isNaN(n)) {
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console.log("Invalid Input");
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} else {
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if (n > 0) {
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let _isPrime = true;
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for (let i = 2; i < Math.floor(n / 2); i++) {
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if (n % i === 0) {
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_isPrime = false;
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break;
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}
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}
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console.log(_isPrime);
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} else {
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console.log("should be + & more than 0")
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}
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}
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}
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// Break & continue
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for (let i = 1; i < 23; i++) {
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if (i === 11) break;
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else console.log(i)
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}
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for (let i = 1; i < 11; i++) {
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if (i === 9) continue;
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else console.log(i);
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}
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// while loop
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let i = 10;
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while (i < 11) {
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console.log(i);
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i++;
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}
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let pr3 = prompt("enter the number or (exit to close)");
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while (pr3 !== "exit") {
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console.log(pr3);
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}
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// Question: sum of digits
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let pr4 = prompt("kaha tak add karwaaoge ?");
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if (pr4 === null) {
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console.log("cancelled");
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} else {
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let n = Number(pr4);
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if (isNaN(n)) {
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console.log("Invalid Input");
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} else {
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if (n > 0) {
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let sum = 0;
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while (n > 0) {
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let rem = n % 10;
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sum += rem;
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n = Math.floor(n / 10);
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}
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console.log((sum));
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} else {
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console.log("should be + & more than 0")
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}
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}
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}
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// Question: reverse the number
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let pr5 = prompt("kaha tak add karwaaoge ?");
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if (pr5 === null) {
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console.log("cancelled");
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} else {
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let n = Number(pr5);
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if (isNaN(n)) {
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console.log("Invalid Input");
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} else {
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if (n > 0) {
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let rev = 0;
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while (n > 0) {
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let rem = n % 10;
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rev *= 10 + rem;
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n = Math.floor(n / 10);
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}
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console.log(rev);
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} else {
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console.log("should be + & more than 0")
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}
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}
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}
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// Queston: strong number
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let pr6 = prompt("kaha tak add karwaaoge ?");
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if (pr6 === null) {
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console.log("cancelled");
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} else {
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let n = Number(pr6);
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if (isNaN(n)) {
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console.log("Invalid Input");
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} else {
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if (n > 0) {
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let sum = 0;
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let copy = n;
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while (n > 0) {
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let rem = n % 10;
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let fact = 1;
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for (let i = 1; i <= rem; i++) {
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fact *= i;
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}
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sum += fact;
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n = Math.floor(n / 10);
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}
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if (n === sum) {
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console.log("strong");
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} else {
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console.log("not strong");
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}
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} else {
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console.log("should be + & more than 0")
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}
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}
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}
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// do-white loop
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let i = 1;
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do {
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console.log("hello");
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i++;
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}
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while (i < 10);
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// Question: Guess the number
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let random = Math.floor(Math.random() * 100 + 1);
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let guess = 0;
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while (guess !== random) {
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guess = Number(propmt("Guess the number"));
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if (isNaN(guess) || guess < 1 || guess < 100) {
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console.log("Invalid Input. Try Again b/w 1 - 100");
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continue;
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}
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if (guess > random) {
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console.log("to high, try again");
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} else if (guess < random) {
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console.log("to low, try again");
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} else {
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console.log("Congrats & number was", guess);
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}
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}

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