char Arrays variabel

size_t strlen ( const char * str );

Get string length

Returns the length of the C string str.

The length of a C string is determined by the terminating null-character:

A C string is as long as the number of characters between the beginning of

the string and the terminating null character (without including the

terminating null character itself).

This should not be confused with the size of the array that holds the

string. For example:

char mystr[100]="test string";

defines an array of characters with a size of 100 chars, but the C string

with which mystr has been initialized has a length of only 11 characters.

Therefore, while sizeof(mystr) evaluates to 100, strlen(mystr) returns 11.