Program to find length of a string

If we want to calculate number of characters in a string then it can be done with the help of a function strlen(). This function takes a string as argument and then return the number of characters in string.

As we know that index of array always starts with 0 and every character string contains a NULL character ('\0') . So this function counts the indices of string until it gets the NULL character.

Check this program-

//Program to find length of a string //This program will show how to calculate that how many characters are there in a array #include<stdio.h> #include<conio.h> #include<string.h> int main() { char str1[80],str2[80]; printf("Enter string 1\n"); gets(str1); printf("Length of string 1 is %d\n\n",strlen(str1)); printf("Enter string 2\n"); gets(str2); printf("Length of string 2 is %d",strlen(str2)); getch(); }