Question

How to sum all the prime numbers in an array with TypeScript

Answer 1

function isPrime(n: number) { 
    if (n === 0 || n === 1) return 0;
     
    for (let i: number = 2; i <= Math.sqrt(n); i++) {
        if (n % i === 0) {
            return 0;
        }
    }
     
    return 1;
}
  
  
const arr: number[] = [9, 8, 17, 5, 19, 22, 21, 13, 38, 500, 99, 31];
let sumprime: number = 0;
   
for (let i: number = 0; i < arr.length; i++) {
      if (isPrime(arr[i])) { // 31 19 17 5 13
          sumprime += arr[i]; 
      }
}       
  
console.log(sumprime);
  
  
  
/*
  
85 
   
*/

 

70+ SQL courses for beginners and professionals