C program to print all upper case and lower case Alphabets

C program to print all upper case and lower case Alphabets

In this article, we will discuss the concept of C program to print all upper case and lower case Alphabets

In this post, we are going to learn how to display the upper case(A to Z) and lower case (a to z) Alphabets using loops on C programming language

C code to display all upper case and lower case Alphabets

Code to display all the Alphabets using for loop

The program displays all the upper case and lower case alphabet letters from a to z using for loop in C language

Program 1

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char ch;//char variable declaration
//Printing upper case Alphabets
printf("Uppercase Alphabets are: \n");
for(ch='A'; ch<='Z'; ch++){
printf("%c",ch);
printf(" ");
//display uppercase Alphabets with space
}
printf("\n");//move to next line

//Printing lower case Alphabets
printf("\nLowercase Alphabets are: \n");
for(ch='a'; ch<='z'; ch++){
printf("%c",ch);
printf(" ");
//display lowercase Alphabets with space
}

    //printf("Hello world!\n");
    getch();
    return 0;
}

When the above code is executed, it produces the following result

In the above program, we are using two for loops, one is used to print upper case Alphabet letters and another to print lower case Alphabet letters.

Code to display all Alphabets using while loop

The program displays all the upper case and lower case alphabets letters from a to z using while loop in C language

Program 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char ch;//char variable declaration
//Printing upper case Alphabets
printf("Uppercase Alphabets are: \n");
ch='A';
while(ch<='Z'){
printf("%c",ch);
printf(" ");
//display uppercase Alphabets with space
 ch++;
}
printf("\n");//move to next line

//Printing lower case Alphabets
printf("\nLowercase Alphabets are: \n");
ch='a';
while(ch<='z'){
printf("%c",ch);
printf(" ");
//display lowercase Alphabets with space
ch++;
}

    //printf("Hello world!\n");
    getch();
    return 0;
}

When the above code is executed, it produces the following result

In the above program, we are using two while loops, one is used to print upper case letters and another to print lower case letters

Code to display all  Alphabets using do-while loop

The program displays all the upper case and lower case alphabets letters from a to z using do-while loop in C language

Program 3

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char ch;//char variable declaration
//Printing upper case Alphabets
printf("Uppercase Alphabets are: \n");
ch='A';
do{
printf("%c",ch);
printf(" ");
//display uppercase Alphabets with space
 ch++;
}while(ch<='Z');
printf("\n");//move to next line

//Printing lower case Alphabets
printf("\nLowercase Alphabets are: \n");
ch='a';
do{
printf("%c",ch);
printf(" ");
//display lowercase Alphabets with space
ch++;
}while(ch<='z');

    //printf("Hello world!\n");
    getch();
    return 0;
}

When the above code is executed, it produces the following result

In the above program, we are using two do-while loops, one is used to print upper case letters and another to print lower case letters

Approach

• We will declare a counter variable “ch” of the loop (for loop, while loop and do-while loop) and initialize it by “a”(for print lower case) or “A” (for print upper case);
• The program checks the given condition(ch<=”z” (lower case) or ch<=”Z”(Upper case). If the condition is true, alphabets will be printed
• if the condition is false – loops will be terminated

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