Move All Zeros to the End of an Array in JavaScript

We have to write a function that takes in an array and moves all the zeroes present in that array to the end of the array without using any extra space. We will use the Array.prototype.forEach() method here along with Array.prototype.splice() and Array.prototype.push().

The code for the function will be −

Example

const arr = [34, 6, 76, 0, 0, 343, 90, 0, 32, 0, 34, 21, 54];
const moveZero = (arr) => {
   for(ind = 0; ind < arr.length; ind++){
      const el = arr[ind];
      if(el === 0){
         arr.push(arr.splice(ind, 1)[0]);
         ind--;
      };
   }
};
moveZero(arr);
console.log(arr);

Output

The output in the console will be −

[34, 6, 76, 343, 90, 32, 34, 21, 54, 0, 0, 0, 0]