# ceilf
> Round a single-precision floating-point number toward positive infinity.
## Usage
```javascript
var ceilf = require( '@stdlib/math/base/special/ceilf' );
```
#### ceilf( x )
Rounds a single-precision floating-point number toward positive infinity.
```javascript
var v = ceilf( -4.2 );
// returns -4.0
v = ceilf( 9.99999 );
// returns 10.0
v = ceilf( 0.0 );
// returns 0.0
v = ceilf( NaN );
// returns NaN
```
## Examples
```javascript
var randu = require( '@stdlib/random/base/randu' );
var ceilf = require( '@stdlib/math/base/special/ceilf' );
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*100.0) - 50.0;
console.log( 'ceilf(%d) = %d', x, ceilf( x ) );
}
```
* * *
## C APIs
### Usage
```c
#include "stdlib/math/base/special/ceilf.h"
```
#### stdlib_base_ceilf( x )
Rounds a single-precision floating-point number toward positive infinity.
```c
float y = stdlib_base_ceilf( 3.14f );
// returns 4.0f
```
The function accepts the following arguments:
- **x**: `[in] float` input value.
```c
float stdlib_base_ceilf( const float x );
```
### Examples
```c
#include "stdlib/math/base/special/ceilf.h"
#include
int main() {
float x[] = { 3.14f, -3.14f, 0.0f, 0.0f/0.0f };
float y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_ceilf( x[ i ] );
printf( "ceilf(%f) = %f\n", x[ i ], y );
}
}
```