strlen – calculate the length of a string
If you are implementing some C program dealing with character string, its most likely that at some point of time, you need to know what is the total number of characters in this string. C’s provides a standard library function “strlen” to know this.
$ vim strlength.c[c] #include
$ gcc -o strlength strlength.c
$ ./strlength No. of Characters in helloworld are : 10
As, we can see, we could identify total number of characters in string which is length of string using strlen API.
The description of strlen as per library is as below,
The strlen() function calculates the length of the string s, excluding the terminating null byte (‘\0’).
The strlen() function returns the number of bytes in the string s.