Question

How to find the prime numbers between 1 to 100 in JavaScript

Answer 1

function isPrime(n) {
    if (n < 2 || (n % 2 == 0 && n != 2)) {
        return 0;
    }
  
    const count = Math.floor(Math.sqrt(n));
    for (let i = 3; i <= count; i += 2) {
        if (n % i == 0) {
            return 0;
        }
    }
    return 1;
}
  
let s = "";
for (let n = 2; n <= 100; n++) {
      if (isPrime(n)) {
          s += n + " "
      }
}

console.log(s);
 
 
 

 
/*
run:
 
"2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 "
 
*/

 

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