We are required to write a JavaScript function that takes in a negative integer and returns the sum of its digits
For example −
-234 --> -2 + 3 + 4 = 5 -54 --> -5 + 4 = -1
Let’s write the code for this function −
Example
Following is the code −
const num = -4345; const sumNum = num => { return String(num).split("").reduce((acc, val, ind) => { if(ind === 0){ return acc; } if(ind === 1){ acc -= +val; return acc; }; acc += +val; return acc; }, 0); }; console.log(sumNum(num));
Output
Following is the output in the console −
8