C String Length: strlen() function

The strlen() function returns the length of the given string. It doesn't count null character '\0'.

#include<stdio.h>
#include <string.h>  
int main(){  
char ch[20]={'j', 'a', 'v', 'a', 't', 'p', 'o', 'i', 'n', 't', '\0'};  
   printf("Length of string is: %d",strlen(ch));  
 return 0;  
}  

Output:

Length of string is: 10

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