Real number that is greater than or equal to zero.

The only number that is both positive and negative is the number 0.

In general, the sign of a positive integer is implied and we do not write it.

The opposite of a positive number is a negative number with the same absolute value and vice versa.

In general, the sign of a positive integer is implied and we do not write it.

The opposite of a positive number is a negative number with the same absolute value and vice versa.

- The opposite of –5 is 5.
- The opposite of 7 is –7.

### Examples

The numbers 5, 7, \(\frac{1}{2}\), \(\sqrt{6}\), 2.8 and 13π are positive numbers.