JavaScript Tutorial - How exactly Functions with return and global Variables works

Published: 01 January 1970
on channel: Programming for Everybody

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JavaScript Tutorial - How exactly Functions with return and global Variables works
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Hello, today we will see, how functions work, in which command return is.

We have defined the function increaseValue, which increases the variable A by the value 2 and at the same time returns the variable A with the command return.

In the next step, we define that the value of the variable B should be equal to the value that the function increaseValue returns.

The question arises as to what the value of variable A will now be, and the answer is that as soon as we call the function increaseValue, this function returns the value of variable A to variable B, but before the return statement this function also increases variable A by 2.

Variable A thus will have a value 2 now and the same value will have variable B, in which this value function increaseValue returns.

We can now start the page and see that both variables have a value of 2.

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