Question 178064 in Javascript Question posted in
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What’s the best way to get the highest digit of a number in JS?

I want to show the highest value of digit.
But it returns the 1 index
Here is the code

function highestDigit(num) {
  let temp = [];
  let arr = temp.push(num)

  while (arr > 0) {
    Math.max(arr)
    return arr
  }
}

console.log(highestDigit(379)) // answer return 1

I am trying to check all the value. And the return the highest value of the all the digit.

Tags:

2

Answers


  1. 0 
    function highestDigit(num) {
  let arr = num.toString().split('').map(Number);
  let maxDigit = Math.max(...arr);
  return maxDigit;
}

    console.log(highestDigit(379)); // Output: 9

    Here we are spliting all digits into array and then checking for max from it.

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  2. 0

    function highestDigit(num) { let temp = []; let arr = temp.push(num);

    let maxDigit = 0;

    while (arr > 0) { const digit = arr % 10; // Extract the last digit maxDigit = Math.max(maxDigit, digit); // Update maxDigit if the current digit is greater arr = Math.floor(arr / 10); // Remove the last digit from arr }

    return maxDigit; }

    console.log(highestDigit(379)); // Output: 9

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