# Boolean

- [`greater`](#greater)
- [`greaterOrEqual`](#greaterorequal)
- [`less`](#less)
- [`lessOrEqual`](#lessorequal)
- [`equal`](#equal)
- [`notEqual`](#notequal)
- [`identical`](#identical)
- [`notIdentical`](#notidentical)
- [`isNull`](#isnull)
- [`isUndefined`](#isundefined)
- [`isNil`](#isnil)
- [`isNumber`](#isnumber)
- [`isString`](#isstring)
- [`isFunction`](#isfunction)
- [`isArray`](#isarray)
- [`isObject`](#isobject)
- [`isDefined`](#isdefined)

You can check the module import [`here`](./modules.md).

#### greater

Returns true if the first value is greater than the second value.

##### File

```typescript
import { NgIsGreaterPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | greater: 1 }}
<!-- false -->
{{ 1 | greater: 0 }}
<!-- true -->
{{ 1 | greater: 1 }}
<!-- false -->
```

#### greaterOrEqual

Returns true if the first value is greater or equal to the second value.

##### File

```typescript
import { NgIsGreaterOrEqualPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | greaterOrEqual: 1 }}
<!-- false -->
{{ 1 | greaterOrEqual: 0 }}
<!-- true -->
{{ 1 | greaterOrEqual: 1 }}
<!-- true -->
```

#### less

Returns true if the first value is less than the second value.

##### File

```typescript
import { NgIsLessPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | less: 1 }}
<!-- true -->
{{ 1 | less: 0 }}
<!-- false -->
{{ 1 | less: 1 }}
<!-- false -->
```

#### lessOrEqual

Returns true if the first value is less or equal to the second value.

##### File

```typescript
import { NgIsLessOrEqualPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | lessOrEqual: 1 }}
<!-- true -->
{{ 1 | lessOrEqual: 0 }}
<!-- false -->
{{ 1 | lessOrEqual: 1 }}
<!-- true -->
```

#### equal

Returns true if the value are equal (operator `==`).

##### File

```typescript
import { NgIsEqualPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | equal: 1 }}
<!-- false -->
{{ 1 | equal: '1' }}
<!-- true -->
{{ 1 | equal: 1 }}
<!-- true -->
```

#### notEqual

Returns true if the value are not equal (operator `!=`).

##### File

```typescript
import { NgIsNotEqualPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | notEqual: 1 }}
<!-- true -->
{{ 1 | notEqual: '1' }}
<!-- false -->
{{ 1 | notEqual: 1 }}
<!-- false -->
```

#### identical

Returns true if the value are identical (operator `===`).

##### File

```typescript
import { NgIsIdenticalPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | identical: 1 }}
<!-- false -->
{{ 1 | identical: '1' }}
<!-- false -->
{{ 1 | identical: 1 }}
<!-- true -->
```

#### notIdentical

Returns true if the value are not identical (operator `!==`).

##### File

```typescript
import { NgIsNotIdenticalPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 0 | notIdentical: 1 }}
<!-- true -->
{{ 1 | notIdentical: '1' }}
<!-- true -->
{{ 1 | notIdentical: 1 }}
<!-- false -->
```

#### isNull

Returns true if the value if null.

##### File

```typescript
import { NgIsNullPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ null | isNull }}
<!-- true -->
{{ 1 | isNull }}
<!-- false -->
```

#### isUndefined

Returns true if the value if undefined.

##### File

```typescript
import { NgIsUndefinedPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ a | isUndefined }}
<!-- true if a does not exists -->
{{ 1 | isUndefined }}
<!-- false -->
```

#### isNil

Returns true if the value if null or undefined.

##### File

```typescript
import { NgIsNilPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ a | isNil }}
<!-- true if a does not exists -->
{{ null | isNil }}
<!-- true -->
{{ 1 | isNil }}
<!-- false -->
```

#### isNumber

Returns true if the value is a number.

##### File

```typescript
import { NgIsNumberPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 'a' | isNumber }}
<!-- false -->
{{ 1 | isNumber }}
<!-- true -->
```

#### isString

Returns true if the value is a string.

##### File

```typescript
import { NgIsStringPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 'a' | isString }}
<!-- true -->
{{ 1 | isString }}
<!-- false -->
```

#### isFunction

Returns true if the value is a function.

##### File

```typescript
import { NgIsFunctionPipeModule } from 'angular-pipes';
```

##### Usage

```javascript
myFn() {
    // ...
}
```

```html
{{ 'a' | isFunction }}
<!-- false -->
{{ myFn | isFunction }}
<!-- true -->
```

#### isArray

Returns true if the value is an array.

##### File

```typescript
import { NgIsArrayPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 'a' | isArray }}
<!-- false -->
{{ [] | isArray }}
<!-- true -->
```

#### isObject

Returns true if the value is an object.

##### File

```typescript
import { NgIsObjectPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 'a' | isObject }}
<!-- false -->
{{ {} | isObject }}
<!-- true -->
```

#### isDefined

Returns true if the value is defined (nor null nor undefined).

##### File

```typescript
import { NgIsDefinedPipeModule } from 'angular-pipes';
```

##### Usage

```html
{{ 'a' | isDefined }}
<!-- true -->
{{ null | isDefined }}
<!-- false -->
{{ a | isDefined }}
<!-- false if a does not exists -->
```