59.C Program to Find the Length of a String

C Program to Find the Length of a String

In this article, you'll learn to find the length of a string without using strlen() function.

To understand this example, you should have the knowledge of following C programming topics:

• C Programming Strings
• String Manipulations In C Programming Using Library Functions
• C Programming for Loop

You can use standard library function strlen() to find the length of a string but, this program computes the length of a string manually without using strlen() funtion.

Example: Calculate Length of String without Using strlen() Function

#include <stdio.h>
int main()
{
    char s[1000], i;

    printf("Enter a string: ");
    scanf("%s", s);

    for(i = 0; s[i] != '\0'; ++i);

    printf("Length of string: %d", i);
    return 0;
}

Output

Enter a string: Programiz
Length of string: 9

This program asks user to enter a string and computes the length of string manually using for loop.

Check out these related examples:

• C Program to Copy String Without Using strcpy()
• C Program to Find the Frequency of Characters in a String
• C Program to Remove all Characters in a String Except Alphabet