Question

If I want to increment a value and then store it in another variable, why is it not possible to do it on one line of code?

This works

var count = 0;
count++;
var printer = count;
alert(printer); //Prints 1

But this doesn’t

var count = 0;
var printer = count++;
alert(printer); //Prints 0

Answer 1

You’re using the post-incrementing operator. The increment happens after the assignment expression is complete.

Use the pre-incrementing version instead…

++count;

Or use the += operator…

count += 1;

• MDN Operators documentation