Code:
function sumfunct(x,y)
{
let sum = 0;
sum = (x === null ? 0 : x) + (y === null ? 0 : y);
return sum;
}
if one of the input values are null then it returns Nan
Please help me to return some value
Add default values to your function arguments.
const sum = (x = 0, y = 0) => x + y;
In case they are null or undefined values will be 0;
For a better handle you can use something like:
const sum = (x, y) => {
const a = Number.isFinite(+x) ? +x : 0;
const b = Number.isFinite(+y) ? +y : 0;
return a + b;
}
The logic operator === matches both type and value. If you don't pass an argument the default value is undefined which is not null, hence you add a number to undefined.
function sumfunct(x,y)
{
let sum = 0;
sum = (!x ? 0 : x) + (!y ? 0 : y);
return sum;
}
In JavaScript all those values: (0, undefined, null, false, '') Will return false.
If you use the triple = like ===. This check also the TYPE. So if you have undefined as a value, this will not be === to null.
Check the simple function here, this may solve your problem.
function sumfunct(x,y)
{
let sum = 0;
sum = (x ? x : 0) + (y ? y : 0);
return sum;
}