Sum all digits of a number in Javascript.

To sum all digits of a number in JavaScript, you can use a function that takes a number as an input and returns the sum of its digits. One possible way to implement this function is:

JavaScriptAI-generated code. Review and use carefully. 

function sumDigits(num) {
  // Convert the number to a string
  let numStr = num.toString();
  // Initialize a variable to store the sum
  let sum = 0;
  // Loop through each character of the string
  for (let i = 0; i < numStr.length; i++) {
    // Convert the character to a number and add it to the sum
    sum += Number(numStr[i]);
  }
  // Return the sum
  return sum;
}

Here is an example of using this function:

JavaScriptAI-generated code. Review and use carefully. More info on FAQ.

// Test the function with a number
let num = 1234;
// Call the function and store the result
let result = sumDigits(num);
// Print the result
console.log("The sum of digits of " + num + " is " + result);
// Output: The sum of digits of 1234 is 10