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# ActionScript 3.0 and Math

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## Summing up Math Operations

You have covered a lot of math in this chapter, but more importantly, you were able to expand your knowledge of working with numbers and variables and start doing some calculations with them. Table 4.1 will serve as a handy reference for the operations that were covered in this chapter:

#### Table 4.1. Mathematical Operators

 Operator Definition Example + Addition 4 + 5 results in 9 – Subtraction 5 – 4 results in 1 * Multiplication 2 * 3 results in 6 / Division 5 / 2 results in 2.5 % Modulo 5 / 2 results in 1 += Addition assignment if x is 5, x += 3 changes x to 8 -= Subtraction assignment if x is 5, x -= 2 changes x to 3 *= Multiplication assignment if x is 5, x *= 3 changes x to 15 /= Division assignment if x is 5, x /= 2 changes x to 2.5 %= Modulo assignment if x is 5, x %= 2 changes x to 1 ++ Increment if x is 5, x++ changes x to 6 -- Decrement if x is 5, x-- changes x to 4