strlen : character string length

Synopsis

#include <string.h>
size_t strlen(const char *str);
```### Description

The strlen function works out the length of the string starting at *str by counting chararacters until it reaches a NULL character.### Returns

strlen returns the character count.

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**Authoritative source**: BUSMASTER DITA help source `strlen.dita`, compiled into `BUSMASTER.CHM` with the application.