C Program to Read String and Print It

Write a C Program that Asks for String and Display it

In this tutorial, we will learn how to read string from the user and displaying in the console using C Program. So let’s write a C program to Read String and Print it.

This problem consists of when the program is run, the user will be asked to input a string from the keyboard. After taking input simply display it into the console.

Algorithm – Read String and Print It

In C programming, you can read the string from the keyboard using several ways. Each method is shown below. Before that let’s make an expressive algorithm of this problem;

  • In the main function, declare a character array size of 100. char str[100]
  • Ask the user for string input using scanf() or gets() or fgets() function. Each function has its own advantage and disadvantage.
  • After taking input, print the string in the console using printf() or puts() function.

Program – Read String and Print It

#include <stdio.h>
int main() {
    char str[100];

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

    printf("You entered: %s\n", str);

    return 0;
}
Sample InputSample Output
Enter desired string: AllahYou entered: Allah
Enter desired string: Hello WorldYou entered: Hello

WARNING: Notice that for the above program, the second input was Hello World, but in the output, you will get Hello only. It is because using the scanf() function, the string is taken the first word only.

Program-2

As the scanf() function can’t read multiple word-based strings. So to solve this program we can use another function for taking input called gets() function.

#include <stdio.h>
int main() {
    char str[100];

    printf("Enter your desired string: ");
    gets(str);

    printf("You entered: %s\n", str);

    return 0;
}
Sample InputSample Output
Hello WorldHello World
I love AllahI love Allah

WARNING: The gets() function is removed from C11. It will still work, but you may get some warning while execution.

Program-3

We can also read strings using another function called fgets()

#include <stdio.h>
#define ARR_ZISE 100
int main() {
    char str[ARR_ZISE];

    printf("Enter desired string: ");
    fgets(str, ARR_ZISE, stdin);

    printf("%s", str);

    return 0;
}
Sample InputSample Output
Enter desired string: Knowledge is power.Knowledge is power.

NOTE: It is the best reliable way of taking string input in C Programming language.

Program-4

Using a special derivative in the scanf() function, you can read strings continuously. That means you can read multi-word strings.

#include <stdio.h> 
int main() { 
   char str[20];
   printf("Enter a string: ");
   scanf("%[^\n]%*c", str); 
   printf("%s\n", str); 
  
   return 0; 
}
Sample InputSample Output
Enter a string: Man is Mortal!Man is Mortal!
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Happy Coding 🙂

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