May 2, 1991 FABS 3

### NAME

fabs, fabsf - floating-point absolute value function

### LIBRARY

Math Library (libm, -lm)

### SYNOPSIS

```double` fabs(```double x`)
```float` fabsf(```float x`)

### DESCRIPTION

The fabs(``) and fabsf(``) functions compute the absolute value of a floating-point number ```x`.

### RETURN VALUES

The fabs(``) function returns the absolute value of ```x`.

### SEE ALSO

abs(3), ceil(3), floor(3), ieee(3), math(3), rint(3)

### STANDARDS

The fabs(``) function conforms to ANSI X3.159-1989 (``ANSI C89'') .