C program to print a string

C program to print a string using various functions such as printf, puts. It terminates with ‘\0’ (NULL character), which is used to mark the end of a string. Consider the following code:

printf(“Hi there! How are you doing?”);

Output:
Hi there! How are you doing?

The string which is passed as an argument to the printf function is printed. Next, we will learn how to print a string that is stored in a character array.

#include <stdio.h>
int main()
 {
 char z[100] = “I am learning C programming language.”;
printf(“%s”, z); // %s is format specifier
return 0;
 }

Output:
I am learning C programming language.

To input a string, we can use scanf and gets functions.

C programming code

#include <stdio.h>
int main()
 {
 char array[100];
printf(“Enter a string\n“);
 scanf(“%s”, array);
printf(“Your string: %s\n“, array);
 return 0;
 }

Output:
Enter a string
We love C.
Your string: We

Only “We” is printed because function scanf can only be used to input strings without any spaces, to input strings containing spaces use gets function.

Input string containing spaces

#include <stdio.h>
int main()
 {
 char z[100];
printf(“Enter a string\n“);
 gets(z);
printf(“The string: %s\n“, z);
 return 0;
 }

Enter a string
Practice makes a person perfect.
The string: Practice makes a person perfect.

Print a string using a loop: We can print a string using a while loop by printing individual characters of the string.

#include <stdio.h>
int main()
 {
 char s[100];
 int c = 0;
gets(s);
while (s[c] != ‘\0‘) {
 printf(“%c”, s[c]);
 c++;
 }
return 0;
 }

You can also use a for loop:

for (c = 0; s[c] != ‘\0‘; c++)
 printf(“%c”, s[c]);