Check Prime Number Program in JavaScript | Find Prime Numbers in JavaScript [Hindi]

Welcome guys, We will see Program on how to find Prime Number in Javascript in Hindi. We will see prime number program in javascript using function and also we will see prime number program in javascript using for loop.
A prime number has only two factors: 1 and itself.
A composite number has more than two factors. The number 1 is neither prime nor composite. The prime numbers between 2 and 31 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 and 31 since each of these numbers has only two factors, itself and 1.

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[reshmar]

lo ji....ek aur wow factor wala video...;-D
thanks a lot
keep it up n keep smiling ;-D

[parmargautam]

if i enter a number 2 so i have no print any output why?

[dineshjaiswal]

Can we are check the number is prim or not in output
I mean write a program to check the number in prim or not input by user.

[akritiyadav]

Nice video. What if we want a program where we want to print values from ex: between 2 to 200. This can't be applied then.

[pallavireddypallu]

if i check isprime(9) its showing 9 is a prime number ....check it once and give brief explanation on that.

[ansumanmohanty]

There is some problem in coding because the number divisible by 3, 5, 7 shows as a prime number.pls help

[bhawanadak]

If a user want to enter number and check it... Then text box show ho tb kese krege

[mohdshameem]

for loop only for if statement not for else statement so put one more parenthesis after if statement and remove one parenthesis after else statement.


<script>
  isprime(27);
  function isprime(num){


    var i;
    var num;
    
    for( i=2; i<num; i++){


      if(num%i===0){
        

        return false;
      }
    }
      

      return true;
    }
  
  
</script>

[sachinhd]

wow its AWESOME, plz make more videos on such program :)

[RohitSharma-ojre]

what if we assign a value 2 then its not work

[soletune]

javascript prog to find prime num in a user given range (using promt & alert tags)

[asharkazi]

This code is wrong if u enter 9 in function the output is prime but 9 % 3 = 0

[parmargautam]

ok..done my problem


var prime = parseInt(prompt("Enter Any Number: "));

function isprime(prime)
{
if (prime === 1) {
document.write(prime + " is neither prime nor composite number. ")
}
for (var i = 2; i <= prime; i++) {
if (prime % i == 0) {
document.write(" This " + prime + " number is not a prime number.");
break;
}
else {
document.write(" This " + prime + " number is a prime number.");
break;
}


}
}
isprime(prime);

[rmt]

That's not correct..
Right ans is-
Function isPrime(num) {
If(num<2) return false;
For(let i=2;i<num;I++){
If(num%i===0) return false}
Return true;
}isPrime(58769);

// u can replace false with not a prime no. And true with prime no.

[sankalpbhola]

Bhai prompt box k sath kaise kare yeah batao 🙏🙏

[SantoshSingh]

even odd ka funda hai bhai na ki prime ka

[devrajdpk]

This video gives us wrong information.check any odd no. which is not prime.This code shows odd no. as a prime no.

[raj]

This function showing 9 is a prime number.

[tslqs]

Thanks you, but this method does not work. If you try the number 51 it will tell you that it is a prime number. And it's not a prime number
.

[garimagarg]

but numbers which are odd like 15 are also prime numbers, it is showing that it is not a prime number