What does the following code display? var a = 1; function f() { function n() { console.log(a); } var a = 2; n(); } f();
1. What does the following code display?
var a = 1;
function f() {
function n() {
console.log(a);
}
var a = 2;
n();
}
f();
|
|
undefined |
|
|
1 |
|
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NaN |
|
|
2 |
above program can shows that the following information:
The console.log() is a function in JavaScript which is used to print any kind of variables defined before in it or to just print any message that needs to be displayed to the user.
Syntax:
console.log(A);
Parameters: It accepts a parameter which can be an array, an object or any message.
Return value: It returns the value of the parameter given.
JavaScript codes to show the working of this function:
1) Passing a number as an argument: If the number is passed to the function console.log() then the function will display it.
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