Question

How to square every digit of a number in JavaScript

Answer 1

function SquareDigits(number) {
    let digit = 0, result = 0, mul = 1;
    
    while (number > 0) {
        digit = number % 10;
        result += digit * digit * mul;
        mul *= (digit <= 3) ? 10 : 100;
        number = Math.floor(number / 10);
    }
    
    return result;
}
        
let num = 234;

num = SquareDigits(num);

console.log(num);



  
/*
run:
      
4916
      
*/

 

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Answer 2

function SquareDigits(number) {
    let string = number.toString(); 
    let result = [];           
    
    for (let i = 0; i < string.length; i++) { 
        result[i] = string[i] * string[i];  
    }
    
    return Number(result.join(''));  
}
        
let num = 234;

num = SquareDigits(num);

console.log(num);



  
/*
run:
      
4916
      
*/

 

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