CODEWITHSUNDEEP
javascript
Yusuf
Yusuf

Reputation: 95

How to get sum of 2 arrays

I've been trying to make a calculator in JavaScript.

My issue is I don't know how to find the sum of 2 arrays (the first number (33) is saved to an array called num1 ) (the second number (99) is saved to an array called num2 ) example(33+99 = ?)

I wrote the below statement but the total returns in a concatenated format ex(1,3,5,3) which is not my intended solution 

     const calculate = (n1,n2) => {
     let result =""

     if (n1.length > 0 ){
        result =  n1 + n2
     }
        return result
     }

     v.push(calculate(num1, num2)) 
     document.getElementById("answer").innerHTML = v

Upvotes: 1

Views: 99

Answers (2)

Yevhen Kazmirchuk
Yevhen Kazmirchuk

Reputation: 129

The example to use only one reduce: 

let array1 = [1,2,3,4,5];
let array2 = [1,2,3,4,5];
array1.concat(array2).reduce((a,v) => a + v,0)

Or even like that:

let array1 = [1,2,3,4,5];
let array2 = [1,2,3,4,5];
[...array1, ...array2].reduce((a,v) => a + v,0)

Upvotes: 0

Ilijanovic
Ilijanovic

Reputation: 14914

Use .reduce()

let array1 = [1,2,3,4,5];
let array2 = [1,2,3,4,5];

let result = array1.reduce((a,v) => a + v,0) + array2.reduce((a,v) => a + v,0);

console.log(result);

Upvotes: 3

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