Question

How to find the frequency of each digit (0–9) in a number with JavaScript

Answer 1

function digitFrequency(num) {
  const freq = {};

  for (const ch of String(num)) {
    freq[ch] = (freq[ch] || 0) + 1;
  }

  return freq;
}

console.log(digitFrequency(120220340501));



/*
run:

{ '0': 4, '1': 2, '2': 3, '3': 1, '4': 1, '5': 1 }

*/

 

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