C Program To Display Characters from A to Z Using Loops

In this post, we will learn how to display characters from A to Z using C Programming language.

So, without further ado, let’s begin the tutorial.

C Program To Display Characters from A to Z Using Loops

// C Program To Display Characters From A to Z Using Loops 
#include <stdio.h>
int main(){
    char c;
    
    // logic
    for (c = 'A'; c <= 'Z'; ++c){
        printf("%c \n", c);
    }
    return 0;
}

Output

 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 

How Does This Program Work ?

    char c;

In this example, we have declared a character data type variable named as c.

    // logic
    for (c = 'A'; c <= 'Z'; ++c){
        printf("%c \n", c);
    }

Then, for loop is used to print all the characters from A to Z.

Some of the used terms are as follow:

#include <stdio.h> – In the first line we have used #include, it is a preprocessor command that tells the compiler to include the contents of the stdio.h(standard input and output) file in the program. 

The stdio.h is a file which contains input and output functions like scanf() and printf() to take input and display output respectively. 

Int main() – Here main() is the function name and int is the return type of this function. The Execution of any Programming written in C language begins with main() function. 

for loop – A loop is used for initializing a block of statements repeatedly until a given condition returns false.

printf() – printf() function is used to display and print the string under the quotation to the screen.

// – Used for Commenting in C.

C Program To Display Alphabets Using While Loop

// C Program To Display Characters From A to Z Using while Loop 
#include <stdio.h>
int main(){
    char c = 'A';

    // logic
    while (c <= 'Z')
    {
        printf("%c \n", c);
        c++;
    }
    return 0;
}

while Loop – In the while loop, the statements inside the body of the while loop keeps executing until it is evaluated to False.

C Program To Display Characters from A to Z Using ASCII Codes

// C Program To Display Characters from A to Z Using ASCII Codes
#include <stdio.h>
int main(){
    int i;
    
    printf("List of all Alphabets from A to Z are:- \n");
    
    // logic
    for (i = 65; i <= 90; i++){
        printf("%c \n", i);
    }
    return 0;
}

C Program To Print Lowercase/Uppercase Alphabets

// C Program To Print Lowercase/Uppercase Alphabets
#include <stdio.h>
int main(){
    char c;
    
    // Asking for Input
    printf("Enter U or u to display Uppercase Alphabets:\n");
    printf("Enter L or l to display Lowercase Alphabets:\n");
    scanf("%c", &c);
    
    // logic 
    if (c == 'U' || c == 'u'){
        for (c = 'A'; c <= 'Z'; ++c){
            printf("%c \n", c);
        }
    }
    else if (c == 'L' || c == 'l'){
        for (c = 'a'; c <= 'z'; ++c){
            printf("%c \n", c);
        }
    }
    else {
        printf("Invalid Character");
    }
    return 0;
}

Output 1

Enter U or u to display Uppercase Alphabets:
Enter L or l to display Lowercase Alphabets:
 U
 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 

Output 2

Enter U or u to display Uppercase Alphabets:
Enter L or l to display Lowercase Alphabets:
 l
 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 

Conclusion

I hope after going through this post, you understand how to display characters from a to z using C Programming language.

If you have any doubt regarding the topic, feel free to contact us in the Comment Section. We will be delighted to help you.