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index.js
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261 lines (218 loc) · 5.2 KB
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// for loop
for (let i = 0; i < 23; i++) {
console.log(i);
}
// Question: print n hello worlds
for (let i = 1; i < 101; i++) {
console.log(`${i} Hello World`);
}
// Question: One to n number and vice versa
for (var i = 1; i < 10; i++) {
console.log(i);
}
console.log(i);
for (let i = 1; i <= 20; i++) {
console.log(i);
}
// Question: Sum of n natural numbers
let pr = prompt("kaha tak add karwaaoge ?");
if (pr === null) {
console.log("cancelled");
} else {
let n = Number(pr);
if (isNaN(n)) {
console.log("Invalid Input");
} else {
if (n > 0) {
let sum = 0;
for (let i = 1; i <= n; i++) {
sum += i;
}
console.log(sum);
} else {
console.log("should be + & more than 0")
}
}
}
// Question: factorial
let prompt = prompt("kaha tak add karwaaoge ?");
if (prompt === null) {
console.log("cancelled");
} else {
let n = Number(prompt);
if (isNaN(n)) {
console.log("Invalid Input");
} else {
if (n > 0) {
let fact = 1;
for (let i = 1; i <= n; i++) {
fact *= i;
}
console.log(fact);
} else {
console.log("should be + & more than 0")
}
}
}
// Factors of number
let pr1 = prompt("kaha tak add karwaaoge ?");
if (pr1 === null) {
console.log("cancelled");
} else {
let n = Number(pr1);
if (isNaN(n)) {
console.log("Invalid Input");
} else {
if (n > 0) {
for (let i = 1; i <= Math.floor(n / 2); i++) {
if (n % i === 0) {
console.log(i);
}
}
console.log(n);
} else {
console.log("should be + & more than 0")
}
}
}
// Question: Prime Number
let pr2 = prompt("kaha tak add karwaaoge ?");
if (pr2 === null) {
console.log("cancelled");
} else {
let n = Number(pr2);
if (isNaN(n)) {
console.log("Invalid Input");
} else {
if (n > 0) {
let _isPrime = true;
for (let i = 2; i < Math.floor(n / 2); i++) {
if (n % i === 0) {
_isPrime = false;
break;
}
}
console.log(_isPrime);
} else {
console.log("should be + & more than 0")
}
}
}
// Break & continue
for (let i = 1; i < 23; i++) {
if (i === 11) break;
else console.log(i)
}
for (let i = 1; i < 11; i++) {
if (i === 9) continue;
else console.log(i);
}
// while loop
let i = 10;
while (i < 11) {
console.log(i);
i++;
}
let pr3 = prompt("enter the number or (exit to close)");
while (pr3 !== "exit") {
console.log(pr3);
}
// Question: sum of digits
let pr4 = prompt("kaha tak add karwaaoge ?");
if (pr4 === null) {
console.log("cancelled");
} else {
let n = Number(pr4);
if (isNaN(n)) {
console.log("Invalid Input");
} else {
if (n > 0) {
let sum = 0;
while (n > 0) {
let rem = n % 10;
sum += rem;
n = Math.floor(n / 10);
}
console.log((sum));
} else {
console.log("should be + & more than 0")
}
}
}
// Question: reverse the number
let pr5 = prompt("kaha tak add karwaaoge ?");
if (pr5 === null) {
console.log("cancelled");
} else {
let n = Number(pr5);
if (isNaN(n)) {
console.log("Invalid Input");
} else {
if (n > 0) {
let rev = 0;
while (n > 0) {
let rem = n % 10;
rev *= 10 + rem;
n = Math.floor(n / 10);
}
console.log(rev);
} else {
console.log("should be + & more than 0")
}
}
}
// Queston: strong number
let pr6 = prompt("kaha tak add karwaaoge ?");
if (pr6 === null) {
console.log("cancelled");
} else {
let n = Number(pr6);
if (isNaN(n)) {
console.log("Invalid Input");
} else {
if (n > 0) {
let sum = 0;
let copy = n;
while (n > 0) {
let rem = n % 10;
let fact = 1;
for (let i = 1; i <= rem; i++) {
fact *= i;
}
sum += fact;
n = Math.floor(n / 10);
}
if (n === sum) {
console.log("strong");
} else {
console.log("not strong");
}
} else {
console.log("should be + & more than 0")
}
}
}
// do-white loop
let i = 1;
do {
console.log("hello");
i++;
}
while (i < 10);
// Question: Guess the number
let random = Math.floor(Math.random() * 100 + 1);
let guess = 0;
while (guess !== random) {
guess = Number(propmt("Guess the number"));
if (isNaN(guess) || guess < 1 || guess < 100) {
console.log("Invalid Input. Try Again b/w 1 - 100");
continue;
}
if (guess > random) {
console.log("to high, try again");
} else if (guess < random) {
console.log("to low, try again");
} else {
console.log("Congrats & number was", guess);
}
}