Here's my code:
function sumDigits(num) {
var string = num.toString();
var result = 0;
for (let i = 0; i < string.length; i++) {
if (string[i] === '-') {
var negative = Number(string[i + 1]) * -1
result = result + negative
} else {
result = result + Number(string[i])
}
}
return result;
}
console.log(sumDigits('-316'))When I add -316 as an argument, my output is 7. Why is it not taking -3 into the equation? As an FYI, I am still new to coding, and not sure this is even the correct route to take. All input is appreciated.
Learn to debug, console.log and debugger are your friend.
function sumDigits(num) {
var string = num.toString();
var result = 0;
console.log("my string:", string);
for (let i = 0; i < string.length; i++) {
console.log("in loop", i, string[i]);
if (string[i] === '-') {
var negative = Number(string[i + 1]) * -1
console.log("in if ", result, "+", negative);
result = result + negative
console.log("updated result", result);
} else {
console.log("in else ", result, "+", Number(string[i]));
result = result + Number(string[i])
console.log("updated result", result);
}
}
console.log("final result", result);
return result;
}
sumDigits(-317);Looking at the results you can see you find a negative and you get the next number. On the next iteration you read that same number again. So -3 + 3 is zero. So you cancel it out. You need to skip your loop ahead by one.
function sumDigits(num) {
var string = num.toString();
var result = 0;
for (let i = 0; i < string.length; i++) {
if (string[i] === '-') {
var negative = Number(string[i + 1]) * -1
result = result + negative
// bump i
i++;
} else {
result = result + Number(string[i])
}
}
return result;
}
console.log(sumDigits(-317));-digit) digits[0] = digits[0] + digits[1];.
-then I am removing 2nd element from digits array. digits.splice(1, 1);forEach loop and returning total of the dum digits to total.const digitsSum = (number) => {
let total = 0;
if (number < 0) {
let digits = number.toString().split('');
digits[0] = digits[0] + digits[1];
digits.splice(1, 1);
digits.forEach(digit => total += parseInt(digit));
console.log(total);
return total;
} else {
let digits = number.toString().split('');
digits.forEach(digit => total += parseInt(digit));
console.log(total);
return total;
}
}
function calculateDigitSumLogic(number) {
}
digitsSum(-1203);
digitsSum(1203);
digitsSum(-201);