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### Special Assignment Operators `++`

and `--`

C has some special operators that can simplify code. The simplest of these are the increment and decrement operators:

`++`

- increment: add one to
`--`

- decrement: subtract one from

You can use these with any integer or floating point variable (or a
character in some cases, carefully). They simply add or subtract 1
from a variable. The following three statements are equivalent:

variable = variable + 1; variable++; ++variable;

So are these three:

variable = variable - 1; variable--; --variable;

Notice that the `++`

and `--`

operators can be placed before
or after the variable. In the cases above, the two forms work
identically, but there is actually a subtle difference. (See Postfix and prefix ++ and -, for more information.)