When you want to perform an arithmetic operation on a variable and assign the result back to the same variable, you can use the syntactical shortcut shown below.
Instead of writing :
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| x = x * 3; // Multiply x by 3 |
you can just write :
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| x *= 3; // Multiply x by 3 |
You can do the same thing with all arithmetic operators :
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| x += 10; // Add 10 to xx -= 10; // Subtract 10 from xx /= 10; // Divide x by 10x %= 2; // Get remainder after dividing x by 2 |
These operators are known as compound assignment operators.