C program to find the length of a string without strlen( ) function

This program calculates the length  of a string manually using a for loop.We are not using strlen( ) over here.

SOURCE CODE

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#include int main() { char i, str[100]; printf("Enter the string: "); scanf("%s", str); for(i = 0; str[i] != '\0'; i++); printf("Length of string: %d", i); return 0; }

OUTPUT

Explanation:

Here within the main() we have declared one character variable i and one character string srt[].Then we print a message for the user to input the string and stores it in str[]. Then we are running a for loop which run from i=0 until str[i]!='/0' i.e, null and it will count the i i.e, the number of elements in the string.Next we just print the value of i , i.e, the number of elements in the string.

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