Question 409672 in Javascript Question posted in
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Javascript – Why console.log on chrome console display undefined and does not print out value? What to do if I want to list a value?

enter image description hereTry this in chrome console:

var x =2;
console.log(x);

Why console.log() on chrome console display undefined and does not print out value? Is there anything wrong in my setting?

What to do if I want to list a value on the console?

P.S. add an image to show the output on console

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I reset the chrome inspector using the suggested method below and it works fine now.

    How to reset chrome inspector?


  2. 0

    Your code should be giving the below output in console –

    2
undefined

    Browser console also prints return value of the last statement method or function call. Return value of console.log() is undefined so it prints undefined also.
    Try these cases –

    Case 1:

    function log(y){
    console.log(y);
    return y + 1;
};
var x = 2;
log(2);

    Output –

    2 - console.log(y)
3 - return value of log(x)

    Case 2:

    function log(y){
    console.log(y);
    return y + 1;
};
var x = 2;
log(x);
console.log(x);

    Output –

    2 - console.log(y)
2 - console.log(x)
undefined - return value of console.log(x)

    Case 3:

    function log(y){
    console.log(y);
    return y + 1;
};
var x = 2;
console.log(x);
log(x);

    Output –

    2 - console.log(x)
2 - console.log(y)
3 - return value of log(x)
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