Internal working of reduce function in javascrip does not return any value please debug

JavaScript
1 
function reduce(array, callback, initialValue) {
   for(let i=0;i<array.lenght;i++)
     {
       
        initialValue = callback(initialValue,array[i]);
       
        
     }
  return initialValue;
}


const nums = [4, 1, 3];
const add = function(a, b) { return a + b; }
reduce(nums, add, 0);//-> 8
2

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

Pre-formatted-text
Pre-formatted-text1356×380 401 KB

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).

3

You have a typo in your loop conditions.