JavaScript Program to check a number is prime or not
In this program, You will learn how to check a number is prime or not in JavaScript.
for(init; condition; increment/decrement){
//Statement
}
![JavaScript Program to check a number is prime or not](https://xiith.com/wp-content/uploads/2020/05/Some-list-of-prime-numbers.png)
Example: How to check a number is prime or not in JavaScript
let n = parseInt(prompt("Enter a number:"))
let p = 1
if (n == 1) {
console.log("Number is not prime:" + n)
} else {
for (i = 2; i < n; i++) {
if (parseInt(n % i) == 0) {
p = 0
break
}
}
if (p == 1) {
console.log("Number is prime:" + n)
} else {
console.log("Number is not prime:" + n)
}
}
Output:
Enter a number:> 23
Number is prime:23