The task is to print all English alphabets from A to Z or a to z using loops in C.
- The alphabets can be printed using ASCII values or character variables.
- This article covers three approaches: for loop, while loop, and do-while loop.
Approaches to Print Alphabets From A to Z Using Loop
1. Print Alphabets Using ASCII Values
In ASCII, uppercase alphabets range from 65 (A) to 90 (Z), while lowercase alphabets range from 97 (a) to 122 (z). We can iterate through these values and typecast each integer to char to print the corresponding alphabet.
#include <iostream>
using namespace std;
int main()
{
int i;
cout << "Alphabets from (A-Z) are:\n";
// ASCII value of A=65 and Z=90
for (i = 65; i <= 90; i++) {
// Integer i with %c will be converted to character
// before printing.%c will takes its equivalent
// character value
cout << (char)i << " ";
}
cout << "\nAlphabets from (a-z) are:\n";
// ASCII value of a=97 and z=122
for (i = 97; i <= 122; i++) {
// Integer i with %c will be converted to character
// before printing.%c will takes its equivalent
// character value
cout << (char)i << " ";
}
return 0;
}
#include <stdio.h>
int main()
{
int i;
printf("Alphabets from (A-Z) are:\n");
// ASCII value of A=65 and Z=90
for (i = 65; i <= 90; i++) {
// Integer i with %c will be converted to character
// before printing.%c will takes its equivalent
// character value
printf("%c ", i);
}
printf("\nAlphabets from (a-z) are:\n");
// ASCII value of a=97 and z=122
for (i = 97; i <= 122; i++) {
// Integer i with %c will be converted to character
// before printing.%c will takes its equivalent
// character value
printf("%c ", i);
}
return 0;
}
public class Main {
public static void main(String[] args) {
int i;
System.out.println("Alphabets from (A-Z) are:");
// ASCII value of A=65 and Z=90
for (i = 65; i <= 90; i++) {
// Integer i with %c will be converted to character
// before printing.%c will takes its equivalent
// character value
System.out.print((char)i + " ");
}
System.out.println("\nAlphabets from (a-z) are:");
// ASCII value of a=97 and z=122
for (i = 97; i <= 122; i++) {
// Integer i with %c will be converted to character
// before printing.%c will takes its equivalent
// character value
System.out.print((char)i + " ");
}
}
}
def main():
print("Alphabets from (A-Z) are:")
# ASCII value of A=65 and Z=90
for i in range(65, 91):
# Integer i with chr() will be converted to character
# before printing. chr() will take its equivalent
# character value
print(chr(i), end=" ")
print("\nAlphabets from (a-z) are:")
# ASCII value of a=97 and z=122
for i in range(97, 123):
# Integer i with chr() will be converted to character
# before printing. chr() will take its equivalent
# character value
print(chr(i), end=" ")
if __name__ == "__main__":
main()
# This code is contributed by Dwaipayan Bandyopadhyay
using System;
public class GFG
{
public static void Main()
{
int i;
Console.WriteLine("Alphabets from (A-Z) are:");
// ASCII value of A=65 and Z=90
for (i = 65; i <= 90; i++)
{
// Integer i with (char) will be converted to character
// before printing. (char) will take its equivalent
// character value
Console.Write((char)i + " ");
}
Console.WriteLine("\nAlphabets from (a-z) are:");
// ASCII value of a=97 and z=122
for (i = 97; i <= 122; i++)
{
// Integer i with (char) will be converted to character
// before printing. (char) will take its equivalent
// character value
Console.Write((char)i + " ");
}
}
}
console.log("Alphabets from (A-Z) are:");
// ASCII value of A=65 and Z=90
for (let i = 65; i <= 90; i++) {
// Convert the ASCII value to a character and print it
console.log(String.fromCharCode(i) + " ");
}
console.log("\nAlphabets from (a-z) are:");
// ASCII value of a=97 and z=122
for (let i = 97; i <= 122; i++) {
// Convert the ASCII value to a character and print it
console.log(String.fromCharCode(i) + " ");
}
Output
Alphabets from (A-Z) are: 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 Alphabets from (a-z) are: 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
Explanation: The loop starts from the ASCII value of the first alphabet and increments it by 1 until it reaches the last alphabet. The (char) typecast converts each ASCII value into its corresponding character.
2. Print Alphabets Using a for Loop
Instead of using ASCII values directly, we can initialize a char variable with 'A' and increment it until 'Z'. The same approach can be used for lowercase alphabets.
#include <bits/stdc++.h>
using namespace std;
int main()
{
// Declare the variables
char i;
// Display the alphabets
cout << "The Alphabets from A to Z are: \n";
// Traverse each character
// with the help of for loop
for (i = 'A'; i <= 'Z'; i++) {
// Print the alphabet
cout << i << " ";
}
// Display the alphabets
cout << "\nThe Alphabets from a to z are: \n";
for (i = 'a'; i <= 'z'; i++) {
// Print the alphabet
cout << i << " ";
}
return 0;
}
#include <stdio.h>
int main()
{
// Declare the variables
char i;
// Display the alphabets
printf("The Alphabets from A to Z are: \n");
// Traverse each character
// with the help of for loop
for (i = 'A'; i <= 'Z'; i++) {
// Print the alphabet
printf("%c ", i);
}
printf("\nThe Alphabets from a to z are: \n");
// Traverse each character
// with the help of for loop
for (i = 'a'; i <= 'z'; i++) {
// Print the alphabet
printf("%c ", i);
}
return 0;
}
class GFG {
public static void main(String[] args)
{
// Declare the variables
char i;
// Display the alphabets
System.out.printf("The Alphabets from A to Z are: \n");
// Traverse each character
// with the help of for loop
for (i = 'A'; i <= 'Z'; i++) {
// Print the alphabet
System.out.printf("%c ", i);
}
// Display the alphabets
System.out.printf("\nThe Alphabets from a to z are: \n");
// Traverse each character
// with the help of for loop
for (i = 'a'; i <= 'z'; i++) {
// Print the alphabet
System.out.printf("%c ", i);
}
}
}
if __name__ == '__main__':
# Declare the variables
i = chr;
# Display the alphabets
print("The Alphabets from A to Z are: ");
# Traverse each character
# with the help of for loop
for i in range(ord('A'), ord('Z') + 1):
# Print the alphabet
print(chr(i), end=" ");
# Display the alphabets
print("\nThe Alphabets from a to z are: ");
# Traverse each character
# with the help of for loop
for i in range(ord('a'), ord('z') + 1):
# Print the alphabet
print(chr(i), end=" ");
using System;
class GFG
{
public static void Main(String[] args)
{
// Declare the variables
char i;
// Display the alphabets
Console.Write("The Alphabets from A to Z are: \n");
// Traverse each character
// with the help of for loop
for (i = 'A'; i <= 'Z'; i++)
{
// Print the alphabet
Console.Write("{0} ", i);
}
// Display the alphabets
Console.Write("\nThe Alphabets from a to z are: \n");
// Traverse each character
// with the help of for loop
for (i = 'a'; i <= 'z'; i++)
{
// Print the alphabet
Console.Write("{0} ", i);
}
}
}
<script>
// Javascript program to find the print
// Alphabets from A to Z
// Declare the variables
let i;
// Display the alphabets
document.write("The Alphabets from A" +
" to Z are: " + "</br>");
// Traverse each character
// with the help of for loop
for(i = 'A'.charCodeAt();
i <= 'Z'.charCodeAt(); i++)
{
// Print the alphabet
document.write(
String.fromCharCode(i) + " ");
}
// Display the alphabets
document.write("The Alphabets from a" +
" to z are: " + "</br>");
// Traverse each character
// with the help of for loop
for(i = 'a'.charCodeAt();
i <= 'z'.charCodeAt(); i++)
{
// Print the alphabet
document.write(
String.fromCharCode(i) + " ");
}
</script>
Output
The Alphabets from A to Z are: 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 The Alphabets from a to z are: 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
Explanation: The for loop starts with 'A' and increments the character until 'Z'. Since consecutive English alphabet characters have consecutive character codes, incrementing the char variable prints the alphabets in order.
3. Print Alphabets Using a while Loop
We can also use a while loop to print alphabets. The character variable is initialized with the starting alphabet and incremented after each iteration.
#include <bits/stdc++.h>
using namespace std;
int main()
{
// Declare the variables
char i;
// Display the alphabets
cout << "The Alphabets from A to Z are: \n";
// Traverse each character
// with the help of while loop
i = 'A';
while (i <= 'Z') {
cout << i << ' ';
i++;
}
// Display the alphabets
i = 'a';
cout << "\nThe Alphabets from a to z are: \n";
while (i <= 'z') {
cout << i << ' ';
i++;
}
return 0;
}
#include <stdio.h>
int main()
{
// Declaring the variable
char i;
// Display the alphabets
printf("The Alphabets from A to Z are: \n");
// Traversing each character
// with the help of while loop
i = 'A';
while (i <= 'Z') {
printf("%c ", i);
i++;
}
// for lower case alphabets
printf("\nThe Alphabets from a to z are: \n");
i = 'a';
while (i <= 'z') {
printf("%c ", i);
i++;
}
return 0;
}
import java.io.*;
public class GFG {
public static void main(String[] args) {
// Declare the variables
char i;
System.out.println("The Alphabets from A to Z are: ");
// Traverse each character using a
// while loop
i = 'A';
while (i <= 'Z') {
System.out.print(i + " ");
i++;
}
// Display the lowercase alphabets
i = 'a';
System.out.println("\nThe Alphabets from a to z are: ");
while (i <= 'z') {
System.out.print(i + " ");
i++;
}
}
}
i = 'A'
# Display the alphabets
print "The Alphabets from A to Z are:"
# Traverse each character
# with the help of a while loop
while ord(i) <= ord('Z'):
print i,
i = chr(ord(i) + 1)
# Display the alphabets
i = 'a'
print "\nThe Alphabets from a to z are:"
while ord(i) <= ord('z'):
print i,
i = chr(ord(i) + 1)
using System;
class Program {
static void Main()
{
// Declare the variable
char i;
// Display the alphabets from A to Z
Console.WriteLine("The Alphabets from A to Z are:");
// Traverse each character using a while loop
i = 'A';
while (i <= 'Z') {
Console.Write(i + " ");
i++;
}
// Display the alphabets from a to z
i = 'a';
Console.WriteLine(
"\nThe Alphabets from a to z are:");
while (i <= 'z') {
Console.Write(i + " ");
i++;
}
}
}
// Display the alphabets from A to Z
process.stdout.write("The Alphabets from A to Z are: \n");
for (let i = 65; i <= 90; i++) {
process.stdout.write(String.fromCharCode(i) + " ");
}
// Display the alphabets from a to z
process.stdout.write("\nThe Alphabets from a to z are: \n");
for (let i = 97; i <= 122; i++) {
process.stdout.write(String.fromCharCode(i) + " ");
}
Output
The Alphabets from A to Z are: 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 The Alphabets from a to z are: 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
Explanation: The while loop continues as long as the character is within the required range. The i++ statement moves to the next alphabet after every iteration.
4. Print Alphabets Using a do-while Loop
A do-while loop executes its body at least once before checking the condition. It can also be used to print alphabets from A to Z and a to z.
#include <bits/stdc++.h>
using namespace std;
int main()
{
// Declare the variables
char i;
// Display the alphabets
cout << "The Alphabets from A to Z are: \n";
// Traverse each character
// with the help of while loop
i = 'A';
do{
cout << i << ' ';
i++;
}while (i <= 'Z');
// Display the alphabets
i = 'a';
cout << "\nThe Alphabets from a to z are: \n";
do{
cout << i << ' ';
i++;
}while (i <= 'z');
return 0;
}
#include <stdio.h>
int main()
{
// Declaring the variable
char i;
// Display the alphabets
printf("The Alphabets from A to Z are: \n");
// Traversing each character
// with the help of do while loop
i = 'A';
do {
printf("%c ", i);
i++;
} while (i <= 'Z');
// for lower case alphabets
printf("\nThe Alphabets from a to z are: \n");
i = 'a';
do {
printf("%c ", i);
i++;
} while (i <= 'z');
return 0;
}
public class AlphabetDisplay {
public static void main(String[] args) {
// Declare the character variable 'i'
char i;
// Display the uppercase alphabets
System.out.println("The Alphabets from A to Z are:");
// Initialize 'i' with 'A' and use a do-while loop to print characters from 'A' to 'Z'
i = 'A';
do {
System.out.print(i + " ");
i++;
} while (i <= 'Z');
// Display the lowercase alphabets
System.out.println("\nThe Alphabets from a to z are:");
// Initialize 'i' with 'a' and use a do-while loop to print characters from 'a' to 'z'
i = 'a';
do {
System.out.print(i + " ");
i++;
} while (i <= 'z');
}
}
# Display the alphabets from A to Z
print("The Alphabets from A to Z are: ")
# Initialize the character variable
i = 'A'
# Use a do-while loop to traverse and print the uppercase alphabets
while True:
print(i, end=' ')
i = chr(ord(i) + 1)
if i > 'Z':
break
# Display the alphabets from a to z
print("\nThe Alphabets from a to z are: ")
# Reset the character variable to 'a'
i = 'a'
# Use a do-while loop to traverse and print the lowercase alphabets
while True:
print(i, end=' ')
i = chr(ord(i) + 1)
if i > 'z':
break
using System;
class Program
{
static void Main()
{
// Display the alphabets from A to Z
Console.WriteLine("The Alphabets from A to Z are:");
// Traverse each character with the help of while loop
char i = 'A';
do
{
Console.Write(i + " ");
i++;
} while (i <= 'Z');
// Display a new line
Console.WriteLine();
// Display the alphabets from a to z
Console.WriteLine("The Alphabets from a to z are:");
// Reset the variable
i = 'a';
// Traverse each character with the help of while loop
do
{
Console.Write(i + " ");
i++;
} while (i <= 'z');
// Display a new line
Console.WriteLine();
}
}
// Declare the variable 'i' for characters
let i;
// Display the uppercase alphabets
console.log("The Alphabets from A to Z are:");
// Initialize 'i' with 'A' and use a do-while loop to print characters from 'A' to 'Z'
i = 'A';
do {
process.stdout.write(i + " ");
i = String.fromCharCode(i.charCodeAt(0) + 1);
} while (i <= 'Z');
// Display the lowercase alphabets
console.log("\nThe Alphabets from a to z are:");
// Initialize 'i' with 'a' and use a do-while loop to print characters from 'a' to 'z'
i = 'a';
do {
process.stdout.write(i + " ");
i = String.fromCharCode(i.charCodeAt(0) + 1);
} while (i <= 'z');
Output
The Alphabets from A to Z are: 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 The Alphabets from a to z are: 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
Explanation: The do-while loop prints the current character and increments it. The condition is checked after each iteration, so the loop continues until the character goes beyond 'Z' or 'z'.