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2020-05-19 11:43:42 +03:00
# number-leading-zero
Require or disallow a leading zero for fractional numbers less than 1.
```css
a { line-height: 0.5; }
/** ↑
* This leading zero */
```
This rule ignores mixin parameters in Less.
The `--fix` option on the [command line](../../../docs/user-guide/cli.md#autofixing-errors) can automatically fix all of the problems reported by this rule.
## Options
`string`: `"always"|"never"`
### `"always"`
There *must always* be a leading zero.
The following patterns are considered violations:
```css
a { line-height: .5; }
```
```css
a { transform: translate(2px, .4px); }
```
The following patterns are *not* considered violations:
```css
a { line-height: 0.5; }
```
```css
a { transform: translate(2px, 0.4px); }
```
### `"never"`
There *must never* be a leading zero.
The following patterns are considered violations:
```css
a { line-height: 0.5; }
```
```css
a { transform: translate(2px, 0.4px); }
```
The following patterns are *not* considered violations:
```css
a { line-height: .5; }
```
```css
a { transform: translate(2px, .4px); }
```