C Check whether the given alphabet is upper case or lowercase

In this article, we will discuss the concept of the C Check whether the given alphabet is uppercase or lowercase

In this post, we are going to learn how to check the given alphabet is in upper case or lowercase in C programming language

C Check whether the given alphabet is in upper case or lowercase — Check upper case or lower case

Check whether the given alphabet is upper case or lowercase using Alphabets

The program allows to enter an character, thereafter it checks and displays whether the given character an upper case or lower case or not

Program 1

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

int main()
{
    char ch;
    printf("Enter a character: ");
     scanf("%C",&ch);
     if(ch>='A' && ch<='Z'){
    printf("%c is an upper case letter ",ch);
}
else if(ch>='A' && ch<='z'){
    printf("%c is a lower case letter ",ch);
}
else{
    printf("%c is not a Alphabets ",ch);
}
getch();
    return 0;
}

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

Case 1

Enter a character: D
D is an upper case letter

Case 2

Enter a character: g
g is a lower case letter

Case 3

Enter a character: $
$ is not an Alphabets

Approach

Define a variable as char ch;
The user is asked to enter a character to check uppercase or lowercase
The entered character is stored in ch variable
Use an if statement to check uppercase if the test expression is true, The tested Alphabet is upper case
When the if-statements is false, The control moves to else if and checks the test expression of else-if
If the test expression of else-if is true, The tested Alphabet is lower case
If the test expression of else if is false, control moves to else part and executes else part statement
Finally, the program displays the character whether uppercase or lowercase or not

Check whether the given alphabet is in upper case or lowercase using ASCII value

The program allows to enter an character, thereafter it checks and displays whether the given character an upper case or lower case using ASCII value

Program 2

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

int main()
{
    char ch;//character variable declaration
    printf("Enter a character: ");
     scanf("%C",&ch);//store the entered value
     if(ch>=65 && ch<=90){
    printf("%c is an upper case letter ",ch);
}
else if(ch>=97 && ch<=122){
    printf("%c is a lower case letter ",ch);
}
else{
    printf("%c is not a Alphabets ",ch);
}
getch();
    return 0;
}

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

Case 1

Enter a character: A
A is an upper case letter

Case 2

Enter a character: v
v is a lower case letter

Case 3

Enter a character: &
& is not an Alphabets

Approach

Define a variable as char ch;
The user is asked to enter a character to check uppercase or lowercase
The entered character is stored in ch variable
Use an if statement to check uppercase if the test expression is true, The tested Alphabet is upper case
When the if-statements is false, The control moves to else if and checks the test expression of else-if
If the test expression of else-if is true, The tested Alphabet is lower case
If the test expression of else if is false, control moves to else part and executes else part statement
Finally, the program displays the character whether uppercase or lowercase or not

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C Check whether the given alphabet is upper case or lowercase

C Check whether the given alphabet is upper case or lowercase