Given a character, the task is to check whether the given character is in upper case, lower case, or non-alphabetic character
Examples:
Input: ch = 'A'
Output: A is an UpperCase character
Input: ch = 'a'
Output: a is an LowerCase character
Input: ch = '0'
Output: 0 is not an alphabetic character
Approach: The key to solving this problem lies in the ASCII value of a character. It is the simplest way to find out about a character. This problem is solved with the help of the following detail:
- Capital letter Alphabets (A-Z) lie in the range 65-91 of the ASCII value
- Small letter Alphabets (a-z) lie in the range 97-122 of the ASCII value
- Any other ASCII value is a non-alphabetic character.
Implementation:
C++
// C++ implementation of the above approach#include <bits/stdc++.h>using namespace std;void check(char ch){ if (ch >= 'A' && ch <= 'Z') cout << ch << " is an UpperCase character\n"; else if (ch >= 'a' && ch <= 'z') cout << ch << " is an LowerCase character\n"; else cout << ch << " is not an alphabetic character\n";}// Driver Codeint main(){ char ch; // Get the character ch = 'A'; // Check the character check(ch); // Get the character ch = 'a'; // Check the character check(ch); // Get the character ch = '0'; // Check the character check(ch); return 0;}// This code is contributed by Code_Mech |
C
// C implementation of the above approach#include <stdio.h>void check(char ch){ if (ch >= 'A' && ch <= 'Z') printf("\n%c is an UpperCase character", ch); else if (ch >= 'a' && ch <= 'z') printf("\n%c is an LowerCase character", ch); else printf("\n%c is not an alphabetic character", ch);}// Driver Codeint main(){ char ch; // Get the character ch = 'A'; // Check the character check(ch); // Get the character ch = 'a'; // Check the character check(ch); // Get the character ch = '0'; // Check the character check(ch); return 0;} |
Java
// Java implementation of the above approachclass GFG{ static void check(char ch) { if (ch >= 'A' && ch <= 'Z') System.out.println("\n" + ch + " is an UpperCase character"); else if (ch >= 'a' && ch <= 'z') System.out.println("\n" + ch + " is an LowerCase character" ); else System.out.println("\n" + ch + " is not an alphabetic character" ); } // Driver Code public static void main(String []args) { char ch; // Get the character ch = 'A'; // Check the character check(ch); // Get the character ch = 'a'; // Check the character check(ch); // Get the character ch = '0'; // Check the character check(ch); } }// This code is contributed by Ryuga |
Python3
# Python3 implementation of the above approachdef check(ch): if (ch >= 'A' and ch <= 'Z'): print(ch,"is an UpperCase character"); elif (ch >= 'a' and ch <= 'z'): print(ch,"is an LowerCase character"); else: print(ch,"is not an alphabetic character");# Driver Code# Get the characterch = 'A';# Check the charactercheck(ch);# Get the characterch = 'a';# Check the charactercheck(ch);# Get the characterch = '0';# Check the charactercheck(ch);# This code is contributed by mits |
C#
// C# implementation of the above approach using System;class GFG { static void check(char ch) { if (ch >= 'A' && ch <= 'Z') Console.WriteLine("\n" + ch + " is an UpperCase character"); else if (ch >= 'a' && ch <= 'z') Console.WriteLine("\n" + ch + " is an LowerCase character" ); else Console.WriteLine("\n" + ch + " is not an alphabetic character" ); } // Driver Code public static void Main(String []args) { char ch; // Get the character ch = 'A'; // Check the character check(ch); // Get the character ch = 'a'; // Check the character check(ch); // Get the character ch = '0'; // Check the character check(ch); } } // This code is contributed by Rajput-JI |
Javascript
<script> // JavaScript implementation of // the above approach function check(ch) { if (ch >= "A" && ch <= "Z") document.write(ch + " is an UpperCase character <br>"); else if (ch >= "a" && ch <= "z") document.write(ch + " is an LowerCase character <br>"); else document.write(ch + " is not an alphabetic character <br>"); } // Driver Code var ch; // Get the character ch = "A"; // Check the character check(ch); // Get the character ch = "a"; // Check the character check(ch); // Get the character ch = "0"; // Check the character check(ch); </script> |
PHP
<?php// PHP implementation of the above approachfunction check($ch){ if ($ch >= 'A' && $ch <= 'Z') print($ch . " is an UpperCase character\n"); else if ($ch >= 'a' && $ch <= 'z') print($ch . " is an LowerCase character\n"); else print($ch . " is not an alphabetic " . "character\n");}// Driver Code// Get the character$ch = 'A';// Check the charactercheck($ch);// Get the character$ch = 'a';// Check the charactercheck($ch);// Get the character$ch = '0';// Check the charactercheck($ch);// This code is contributed by mits?> |
Output
A is an UpperCase character a is an LowerCase character 0 is not an alphabetic character
Time Complexity: O(1) as it is doing constant operations
Auxiliary Space: O(1)
Check whether the given character is in upper case, lower case, or non-alphabetic character using the inbuilt library:
C++
// C++ code to check if a char is uppercase, // lowercase or not an alphabetic character#include <bits/stdc++.h>using namespace std;void check(char ch){ if (isupper(ch)) cout << ch << " is an upperCase character\n"; else if (islower(ch)) cout << ch << " is a lowerCase character\n"; else cout << ch << " is not an alphabetic character\n";}// Driver Codeint main(){ char ch; ch = 'A'; // Check the character check(ch); // Get the character ch = 'a'; // Check the character check(ch); // Get the character ch = '0'; // Check the character check(ch); return 0; // This code is contributed by Shivesh Kumar Dwivedi} |
Java
import java.util.*;class Main { public static void check(char ch) { if (Character.isUpperCase(ch)) System.out.println( ch + " is an upperCase character"); else if (Character.isLowerCase(ch)) System.out.println( ch + " is a lowerCase character"); else System.out.println( ch + " is not an alphabetic character"); } public static void main(String[] args) { char ch; ch = 'A'; // Check the character check(ch); // Get the character ch = 'a'; // Check the character check(ch); // Get the character ch = '0'; // Check the character check(ch); }} |
Python3
def check(ch): if ch.isupper(): print(ch, "is an upperCase character") elif ch.islower(): print(ch, "is a lowerCase character") else: print(ch, "is not an alphabetic character")# Driver Codeif __name__ == '__main__': ch = 'A' # Check the character check(ch) # Get the character ch = 'a' # Check the character check(ch) # Get the character ch = '0' # Check the character check(ch) |
C#
using System;class Program{ static void check(char ch) { if (Char.IsUpper(ch)) Console.WriteLine("{0} is an upperCase character", ch); else if (Char.IsLower(ch)) Console.WriteLine("{0} is a lowerCase character", ch); else Console.WriteLine("{0} is not an alphabetic character", ch); } static void Main(string[] args) { char ch; ch = 'A'; // Check the character check(ch); // Get the character ch = 'a'; // Check the character check(ch); // Get the character ch = '0'; // Check the character check(ch); // Pause the console Console.ReadLine(); }} |
Javascript
function check(ch) { if (ch.match(/[A-Z]/)) { console.log(ch + " is an upperCase character"); } else if (ch.match(/[a-z]/)) { console.log(ch + " is a lowerCase character"); } else { console.log(ch + " is not an alphabetic character"); }}// Driver Codelet ch;ch = 'A';// Check the charactercheck(ch);// Get the characterch = 'a';// Check the charactercheck(ch);// Get the characterch = '0';// Check the charactercheck(ch); |
Output
A is an UpperCase character a is an LowerCase character 0 is not an alphabetic character
Time Complexity: O(1)
Auxiliary Space: O(1)
Approach :
This implementation uses a switch statement to check the value of the character. If it is an uppercase letter, it will print that it is an uppercase letter. If it is a lowercase letter, it will print that it is a lowercase letter. Otherwise, it will print that it is not an alphabetic character.
C++
#include <iostream>using namespace std;void check(char ch){ switch(ch) { case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z': cout << ch << " is an UpperCase character\n"; break; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': case 's': case 't': case 'u': case 'v': case 'w': case 'x': case 'y': case 'z': cout << ch << " is a LowerCase character\n"; break; default: cout << ch << " is not an alphabetic character\n"; break; }}int main(){ char ch; ch = 'A'; check(ch); ch = 'a'; check(ch); ch = '0'; check(ch); return 0;} |
C#
using System;class Program{ // Function to check the type of character static void CheckCharType(char ch) { switch (ch) { // Uppercase letters case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z': Console.WriteLine(ch + " is an Uppercase character"); break; // Lowercase letters case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': case 's': case 't': case 'u': case 'v': case 'w': case 'x': case 'y': case 'z': Console.WriteLine(ch + " is a Lowercase character"); break; // Not an alphabetic character default: Console.WriteLine(ch + " is not an alphabetic character"); break; } } static void Main() { char ch; ch = 'A'; CheckCharType(ch); ch = 'a'; CheckCharType(ch); ch = '0'; CheckCharType(ch); // Pause the console before exiting Console.ReadLine(); }} |
Output
A is an UpperCase character a is a LowerCase character 0 is not an alphabetic character
Time Complexity: O(1)
Auxiliary Space: O(1)
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