C program to display characters from a to z using loop

• C program to display characters from a to z using loop.
• We can print all alphabets starting from A to Z using for loop.
• Take a char variable and using for loop iterate it from A to Z.
• Let us see an Example C program to print A to Z using for loop.

Program #1: Write a C program to print or display characters from A to Z using for loop.

1. #include <stdio.h>
2. int main()
3. {
4.     char c;
5.  
6.     for(c = 'A'; c <= 'Z'; ++c)
7.       printf("%c ", c);
8.     
9.     return 0;
10. }

   Output:

1. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Program #2: Write a C Program to Display English Alphabets in Uppercase and Lowercase

1. #include <stdio.h>
2. int main()
3. {
4.      char c;
5.  
6.     printf("Enter u to display alphabets in uppercase. And enter l to display alphabets in
7. lowercase: ");
8.     scanf("%c", &c);
9.  
10.     if(c== 'U' || c== 'u')
11.     {
12.        for(c = 'A'; c <= 'Z'; ++c)
13.          printf("%c ", c);
14.     }
15.     else if (c == 'L' || c == 'l')
16.     {
17.         for(c = 'a'; c <= 'z'; ++c)
18.          printf("%c ", c);
19.     }
20.     else
21.        printf("Error! You entered invalid character.");
22.     getch();
23. }
     

  Output: