无法将字符串转换为数字

Question

I am trying to convert string to number but I am unable to do that , after passing each number from foreach

function sum(num){

 num.toString().split('').forEach(add);

}


function add(value , key) {
    console.log(value);    //  2,3 
   Number(value);
   console.log(typeof(value))   // string string

}


sum(23);

In the code - >

After I did Number(value); in function add(value, key) I am still getting string console.log(typeof(value)) // string

Answer 1

You're not assigning it to a new variable / reassigning the variable:

 function sum(num){ num.toString().split('').forEach(add); } function add(value , key) { console.log( { value } ); const newValue = Number(value); // or alternatively value = Number(value); console.log( typeof newValue ); } sum(23);