# MATH Module

List of Examples

1.1. `math_pow` usage
1.2. `math_logN` usage
1.3. `math_log2` usage
1.4. `math_log10` usage
1.5. `math_sqrt` usage

## 1. Overview

This module provides a collection of functions for math operations.

Note that the result values are casted to intger (long value), being the type supported by the config variables.

## 2. Dependencies

### 2.1. Kamailio Modules

The following modules must be loaded before this module:

• none

### 2.2. External Libraries or Applications

The following libraries or applications must be installed before running Kamailio with this module loaded:

• none

## 3. Functions

### 3.1.  `pow(base, power, res)`

The exponentiation function, computing the base raised to power, storing in res.

This function can be used from ANY_ROUTE.

Example 1.1. `math_pow` usage

```...
math_pow("2", "10", "\$var(res)");
\$var(base) = 2;
\$var(power) = 10;
math_pow("\$var(base)", "\$var(power)", "\$var(res)");
...```

### 3.2.  `math_logN(x, res)`

The function computes the natural logarithm of x and stores the result in res.

This function can be used from ANY_ROUTE.

Example 1.2. `math_logN` usage

```...
math_logN("10", "\$var(res)");
\$var(x) = 10;
math_logN("\$var(x)", "\$var(res)");
...```

### 3.3.  `math_log2(x, res)`

The function computes the base-2 logarithm of x and stores the result in res.

This function can be used from ANY_ROUTE.

Example 1.3. `math_log2` usage

```...
math_log2("16", "\$var(res)");
\$var(x) = 16;
math_log2("\$var(x)", "\$var(res)");
...```

### 3.4.  `math_log10(x, res)`

The function computes the base-10 logarithm of x and stores the result in res.

This function can be used from ANY_ROUTE.

Example 1.4. `math_log10` usage

```...
math_log10("100", "\$var(res)");
\$var(x) = 100;
math_log10("\$var(x)", "\$var(res)");
...```

### 3.5.  `math_sqrt(x, res)`

The function computes the square root of x and stores the result in res.

This function can be used from ANY_ROUTE.

Example 1.5. `math_sqrt` usage

```...
math_sqrt("16", "\$var(res)");
\$var(x) = 16;
math_sqrt("\$var(x)", "\$var(res)");
...```