C provides some shortcuts that can make programming easier. Instead of using x = x + 0x10 we could write this in a shorthand method as x += 0x10;. The "plus equals" means that whatever x is we sant to add 0x10 to it. Example programs will be employing this method from here on out.

The following shows some common shorthand methods used in calculations.

 

Statement	Description
x++;	Autoincrement x, i.e. x = x + 1, x equals x plus 1
x--;	Autodecrement x, i.e. x = x - 1, x equals x minus 1
x += 5;	Add 5 to x
x -= 4	Subtract 4 from 4
x *= 2;	Multiply x by 2
x /= 10;	Divide x by 10
x &= 0x0c;	And x with 0x0c (mask bits 2 and 3)
x |= 0x0f	Or x with 0x0f (set the low order 4 bits)