Arduino - UnsignedInt

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## unsigned int

#### Description

Unsigned ints (unsigned integers) are the same as ints in that they store a 2 byte value. Instead of storing negative numbers however they only store positive values, yielding a useful range of 0 to 65,535 (2^16) - 1).

The difference lies in the way the highest bit, sometimes refered to as the "sign" bit is interpreted. In the Arduino int type, if the high bit is a "1", the number is interpreted as a negative number and the other 15 bits are interpreted with 2's complement math.

#### Example

        int ledPin = 13;

#### Syntax

        int var = val;

- var - your int variable name
- val - the value you assign to that variable

#### Coding Tip

When variables are made to exceed their maximum capacity they "roll over" back to their minimum capacitiy, note that this happens in both directions

       unsigned int x
       x = 0;
       x = x - 1;       // x now contains 65535 - rolls over in neg direction
       x = x + 1;       // x now contains 0 - rolls over

#### See Also

- byte
- int
- long
- unsigned long

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