JavaScript has more operators other than those stated earlier. Let's go little bit deeper.
If you have an integer and you want to increment it by 1 or any number, you can type the following:
var x = 4; // assigns 4 on the variable x. x = x + 1; /* since x=4, and you are adding 1 with x, so the final value is 4 + 1 = 5, and 5 is stored on the same variable x. */
You can also increment your variable by 1, typing the following:
var x = 4; // assigns 4 on the variable x. x++; // This is similar to x = x + 1.
What will you do if you want to increment your variable by more than 1? Well, you can follow this:
var x = 4; // assigns 4 on the variable x. x = x + 3; // Say, you want to increment x by 3. /* since x = 4, and you are adding 3 with x, so the final value is 4 + 3 = 7, and 7 is stored on the same variable x. */
You can increment your variable by typing the following as well:
var x = 4; // assigns 4 on the variable x. x += 3; // This is...