C Program to Display Characters from A to Z Using Loop
You will learn to display the English alphabets using for loop in this example.
To understand this example, you should have the knowledge of following C programming topics:
- C if, if...else and Nested if...else Statement
- C programming while and do...while Loop
Example #1: Program to Display English Alphabets
#include <stdio.h>
int main()
{
char c;
for(c = 'A'; c <= 'Z'; ++c)
printf("%c ", 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
In this program, the for loop is used to display the English alphabets in uppercase.
Here's a little modification of the above program to display the English alphabets in either uppercase or lowercase depending upon the input from the user.
Example #2: Program to Display English Alphabets in Uppercase and Lowercase
#include <stdio.h>
int main()
{
char c;
printf("Enter u to display alphabets in uppercase. And enter l to display alphabets in lowercase: ");
scanf("%c", &c);
if(c== 'U' || c== 'u')
{
for(c = 'A'; c <= 'Z'; ++c)
printf("%c ", c);
}
else if (c == 'L' || c == 'l')
{
for(c = 'a'; c <= 'z'; ++c)
printf("%c ", c);
}
else
printf("Error! You entered invalid character.");
return 0;
}
Output
Enter u to display alphabets in uppercase. And enter l to display alphabets in lowercase: 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
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