CODEWITHSUNDEEP
javascriptvariables
KingKongFrog
KingKongFrog

Reputation: 14429

Javascript variable hoisting for gobal scope

Can someone explain why undefined is printed to the console and not 4?

var a = 4;
function test() {
 if (!a) {
   a = 3;
 }
 console.log(a)
}
undefined

Upvotes: 0

Views: 42

Answers (1)

Tushar
Tushar

Reputation: 87203

This has nothing to do with variable hoisting.

Because you haven't return anything. So, when you execute this code in browser console, it show undefined.

To get 4, as result you need to call the test function and return a from the function.

Code:

var a = 4;

function test() {
    if (!a) {
        a = 3;
    }

    console.log(a);

    // Return a from the function, if needed
    return a;
}

// Call function here
test();

Upvotes: 1

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