Answers for "how to check if a number is single digit in javascript"

3

check if string only contains integer digits numbers javascript

let val = '1234567890' 
let isnum = /^\d+$/.test(val);
if (isnum) {
  // val is a number
}
Posted by: Guest on November-03-2020
0

javascript to check each digit in the number

function test_same_digit(num) {
  const first = num % 10;
  while (num) {
    if (num % 10 !== first) return false;
num = Math.floor(num / 10);
  }
  return true
}

console.log(test_same_digit(1234));
console.log(test_same_digit(1111));
console.log(test_same_digit(22222222));
Posted by: Guest on May-20-2021

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