CODEWITHSUNDEEP
javascript
Evolution1980
Evolution1980

Reputation: 21

Javascript function solution

I need to implement the solution function such as running the following line:

console.log(solution('Hello You !'))

gives the following output (one word per line):

Hello

You

!

The input parameter is always a non-null character string. So i did that code:

function solution(input){
     
     arr=input.split(" ");
    for(var i=0;i<arr.length;i++) {
        console.log(arr[i]);
    }

}
input="Hello You !";
console.log(solution('Hello You !'));

But when i run it , i get the result:

Hello

You

!

undefined

Why the result of my code snippet displays "undefined"?

What is that "undefined"? how can i fix it?

Upvotes: 1

Views: 1107

Answers (3)

Craig McKeachie
Craig McKeachie

Reputation: 1704

In your code, you are returning nothing (undefined) from the solution function so you are getting undefined at the end. I think a very succinct but still readable answer would be the following code if you are permitted to just invoke the solution function without surrounding it in console.log.

        
        function solution(input){     
             input.split(" ").forEach(word=> console.log(word));   
        }
        
        solution('Hello You !')

Upvotes: 0

Robby Cornelissen
Robby Cornelissen

Reputation: 97152

Because the return value of your function is undefined.

You're not only logging to the console from within the function, but you're also logging the return value of your function.

Instead of:

console.log(solution('Hello You !'));

Just do:

solution('Hello You !');

If your requirements dictate that you have to invoke the function with console.log(solution('Hello You !')), you could consider splitting and joining:

const solution = (input) => input.split(' ').join('\n');

console.log(solution('Hello You !'));

Or use a replacement: 

const solution = (input) => input.replaceAll(' ', '\n');

console.log(solution('Hello You !'));

Upvotes: 3

Yair Cohen
Yair Cohen

Reputation: 2268

You're not returning anything, you have to return the arr

function solution(input){
     
     arr=input.split(" ");
    for(var i=0;i<arr.length;i++) {
        console.log(arr[i]);
    }
    
    return arr;
}

When you call a function, the value will be its return value. If no return value is specified, a function returns undefined.

Upvotes: 1

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