When specifying a font size, the value can have leading and trailing zeroes or they can be omitted completely. This does not affect the way the text is rendered.

#### Leading Zeroes

Zeros that appear at the beginning of a number are called

leading zeroes. Example:

`font-size:0.5in`

- the first digit is a leading zero. In all major browsers, leading zeroes are optional. Therefore

`font-size:.5in`

is a valid way of specifying font size. There can also be more than one leading zero.

#### Trailing zero

Zeroes that appear after a decimal point and at the end of the number are called

trailing zeroes. Example:

`font-size:2.50em`

- the last digit is a trailing zero. In all major browsers, trailing zeroes are optional. Therefore, all the following declarations result in the same font size:

`font-size: 2.5em`

font-size:2.50em

font-size: 2.500em