#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[]) {
  // Declare a character array to store the string
  char str[100];

  // Get the command-line argument
  char *arg = argv[1];

  // Copy the command-line argument to the character array
  strcpy(str, arg);

  // Iterate over the character array until you reach the null terminator
  int len = 0;
  while (str[len] != '\0') {
    len++;
  }

  // Print the length of the string
  printf("The length of the string is %d\n", len);

  return 0;
}

gcc -o strlen strlen.c
./strlen <string>

./strlen hello

The length of the string is 5

Further Reading:

What is command line arguments? What is the use of that?

By default Command line Arguments are treated as ?

command line argument in c- load time input in c

write a program for finding length of given string using command line argument in c

write a program to convert asci to integers using command line in c- ATOI

write a program for basic calculator operation using command line in c

assignment of command line argument in c

Enroll Now:

[ C-Programming From Scratch to Advanced 2023-2024] "Start Supercharging Your Productivity!"

Contact Us:

• For any inquiries, please email us at [[email protected]].
• Follow us on insta  [ electro4u_offical_ ] for updates and tips.

Note: If you encounter any issues or specific errors when running this program, please let me know and I'll be happy to help debug them!