Question

How to check if there is only one time zero in a string with JavaScript

Answer 1

function OnlyOneZero(str) {
  let count = 0;
  for (const ch of str.split('')) {
       if (ch == '0') {
            count++;
        }
  }
  return count == 1;
}
    
const s1 = "294098";
console.log(OnlyOneZero(s1) ? "yes" : "no");

const s2 = "47034099";
console.log(OnlyOneZero(s2) ? "yes" : "no");





/*
run:

"yes"
"no"

*/

 

70+ SQL courses for beginners and professionals