Power digit sum help

How can i convert exponential to number ? :thinking:

function powerDigitSum(exponent) {
let num = Math.pow(2,exponent);
let arr = num.toString().split('');
return arr.map(numm => Number(numm)).reduce((number, total) => number+total, 0);



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Challenge: Problem 16: Power digit sum

Link to the challenge:

What do you mean exponential to number?

Try this,

 let num = BigInt(Math.pow(2, exponent)
 let arr = num.toString().split('');
 //Now use .slice() to delete n from the Array
  arr.slice(arr.length - 1)
 // Mapping is not necessary
  return arr.reduce((number, total) => number+total,);

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