JS Algorithm – Max char

Given a string, return the character that is most commonly used in the string.

Examples
maxChar(“abcccccccd”) === “c”
maxChar(“apple 1231111”) === “1”

function maxChar(str) {
  // To save the string in object format
  const chars = {};
  // To count the final result
  let max = 0;
  let maxChar = '';

  // Go through every character in the string
  // This for is for create the object format
  for (let char of str) {
    // If the value of the object doesn't exist
    if (!chars[char]) {
      // Then create the node in the object
      // and assign 1
      chars[char] = 1;
    } else {
      // If that value exist in the object
      // Just increment the value of that node object
      chars[char]++;
    }
  }

  // After the first foor finish
  // then iterate over the object
  for (let char in chars) {
    // check every value of the object
    if (chars[char] > max) {
      // assign the value that meet with the condition
      max = chars[char];

      // assign the key to the variable to know wich key
      maxChar = char;
    }
  }

  return maxChar;
}

maxChar("abcccccccd");

Result:

By Cristina Rojas