Javascript Prime Number Program - How to Check if a Number is a Prime Number | JavaScript Program

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[ahmedsuhailful]

Excellent logic!!! One thing I would add here is the missing of break function. Since it is not added, it shows non-prime number as prime number. For Example:4. Once I added, it worked properly.

[gamerbhai]

is video me aapke itne km likes hain or ab to ab super se uppar hogye keep going and never give up!

[Mayank_Bisht_MB]

If number <= 1, not prime number
Else if number == 2, prime number
Else ( for = baki code to pata hi hoga.

[tawseefaziz]

What about if we enter the number as 2?

[gwalkrishna]

When we enter 2 then it's give undefined why

[raistar]

Sir 2 number ko run karayiye nhi ho rha undefined output aa rha hai

[sahnawazhussain]

number =2;
Let's assume, i = 2; i<number(2<2 'it's false')
How can i check whether 2 is prime number or not?

[debleenaacharya]

11:11 5 prime number nahi hai aapne bola 😅

[prabhatpatel]

let num = 2;
if (num == 1) {
console.log(`${num} is neither prime nor composite`);
} else if (num < 1) {
console.log(`${num} is not a prime number`);
} else {
let isPrime = true;
for (let i = 2; i < num; i++) {
if (num % i === 0) {
isPrime = false;
break;
}
}
if (isPrime) {
console.log(`${num} is a prime number`);
} else {
console.log(`${num} is not a prime number`);
}
}


Updated version of code

[raistar]

Sir 2 number ko run karayiye nhi ho rha undefined output aa rha hai