fmodl - Linux

Overview

fmodl performs a floating-point remainder operation, returning the floating-point remainder of num / den. This resembles the behavior of floating-point division, except the remainder preserves the sign of num. It is implemented in the POSIX standard.

Syntax

fmodl(num, den)

num: The numerator dividend.
den: The denominator divisor.

Options/Flags

None.

Examples

Find the remainder of 12.5 divided by 3.5:
```
echo 12.5 | fmodl 3.5
0.0
```
Obtain the fractional part of a floating-point value:
```
echo 3.14159 | fmodl 1
0.14159
```

Common Issues

Errors may occur if num or den are non-numeric values.
The remainder’s sign is determined by num only, even if den is negative.
For subnormal or very small values, accuracy may be limited due to the limitations of floating-point arithmetic.

Integration

fmodl can be integrated with other commands to perform advanced calculations:

Calculate the phase angle using trigonometric functions:
```
echo 0.707107 | fmodl 2 * 3.14159
1.570796
```
Determine the remainder of a large integer division:
```
echo 267261234567891 | fmodl 1000000
267261
```

Related Commands

fmod – Similar to fmodl but returns a double-precision floating-point remainder.
modf – Decompose a floating-point number into fractional and integer parts.
remainder – Perform an integer remainder operation, preserving the sign of den.