Code in Javascript, please help me to make 0 not negative
function invertSign(val) {
return (val * -1);
}
console.log(invertSign(1)) -1
console.log(invertSign(-2)) 2
console.log(invertSign(0)) -0
You can use || 0:
function invertSign(val) {
return -val || 0;
}
If -val evaluates to -0, it will be a falsy value, and so the || operator will evaluate to the second operand, which is 0. And so -0 is replaced by 0.
Alternatively, you subtract from 0:
function invertSign(val) {
return 0 - val;
}
Here -0 never occurs, because the minus here is not a unary operator, but the binary one. 0 - 0 is just 0, so this may be the simplest solution.
You can check if the value is zero, and if it is, then return 0
function invertSign(val) {
if (val === 0) return 0;
return (val * -1);
}
Try adding an if statement to check if val === 0.
function invertSign(val) {
if (val === 0) return val;
return val * -1;
}
console.log(invertSign(1)); // logs -1
console.log(invertSign(-2)); // logs 2
console.log(invertSign(0)); // logs 0