Check whether the given alphabet is uppercase or lowercase in Java

Check whether the given alphabet is upper case or lowercase

In this article, we will discuss the concept of the Check whether the given alphabet is upper case or lowercase in Java

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

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

Check whether the given alphabet is upper case or lower case

Evaluate the given alphabet is upper case or lowercase

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

Program 1

import java.util.Scanner;
public class CheckUpperLower{
public static void main(String args[]){
    char ch;//variable declaration

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the character  ");
ch=scan.next().charAt(0);;// store the input from the user

if(ch>='A' && ch<='Z'){//if it is true ,display upper case
    System.out.println(ch+" is an upper case letter ");
}
else if(ch>='a' && ch<='z'){//if it is true ,display lower case
    System.out.println(ch+" is a lower case letter ");
}
else{
    System.out.println(ch+" is not a Alphabets ");
}
}
}

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

Case 1

Enter the Character
A
A is an upper case letter

Case 2

Enter the Character
a
a is a lower case letter

Case 3

Enter the Character
$
$ is not an Alphabets

Approach

Define a variable as char ch;
The user is asked to enter a character to check upper case or lower case
The entered value is stored in the variable ch;
Use an if statement to check uppercase. if the test expression is true, the tested Alphabet is upper case
When the if-statement 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

Evaluate the given alphabet is in upper case or lowercase using Ascii value

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

Program 2

import java.util.Scanner;
public class CheckUpperLower1{
public static void main(String args[]){
    char ch;//variable declaration

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the character for find case ");
ch=scan.next().charAt(0);;// store the input from the user

if(ch>=65 && ch<=90){
    System.out.println(ch+" is an upper case letter ");
}
else if(ch>=97 && ch<=122){
    System.out.println(ch+" is a lower case letter ");
}
else{
    System.out.println(ch+" is not an Alphabets ");
}
}
}

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

Case 1

Enter the Character
M
M is an upper case letter

Case 2

Enter the Character
d
d is a lower case letter

Case 3

Enter the Character
%
% is not an Alphabets

Approach

Define a variable as char ch;
The user is asked to enter a character to check upper case or lower case
The entered value is stored in the variable ch;
Use an if statement to check uppercase. if the test expression is true, the tested Alphabet is upper case
When the if-statement 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