How to eliminate string from the array

Question

suppose you have a array that contain numbers and strings. write a function that skip tje strings from the array and sum up all the numbers in an array

Answer 1

arr=[8,3,"hello",3];
sum=0;
arr.forEach(v=>
{ if(typeof v=="number")
{ sum+=v; }});
console.log(sum);

Answer 2

bro make it little difficult. do it without built-in function

Answer 3

i mean write function without any built in function. like donot use typeof function

Answer 4

i mean donot use any built in function

Answer 5

JavaScript

Answer 6

thq dude