Table of Contents
Check whether a character is upper or lower case or not in C
In this article, we will discuss the concept of Check whether a character is upper or lower case or not in C language
In this post, we are going to learn how to write a program to check whether given character is Upper case or lower case or not using if else in C language
Code to find given character is Upper or Lower or not
Code to find given character Upper or Lower or not, using if statements
In this code, we are going to learn how to check the given character is Upper case or lower case or not using if else statements in C language
Program 1
#include <stdio.h>
#include <stdlib.h>
int main()
{
char ch;
//input character from user
printf("Input any character: ");
scanf("%c",&ch);
if(ch >='A' && ch<= 'Z')
{//check if the given Alphabets is upper case
printf("'%c' is an Upper case Alphabet",ch);
}
else if(ch >='a' && ch<= 'z')
{//check if the given Alphabets is lower case
printf("'%c' is a Lower case Alphabet",ch);
}
else{
printf("'%c' is not an Alphabet",ch);
}//Display, if the character is not an English alphabet
getch();
return 0;
}
When the above code is executed, it produces the following result
Case 1
Input any character: A 'A' is an Upper case Alphabet
Case 2
Input any character: s 's' is a Lower case Alphabet
Case 3
Input any character: $ '$' is not an Alphabet
Code to find given character Upper or Lower or not, using Ascii
In this code, we are going to learn how to check the given character is Upper case or lower case or not using Ascii value in C language
Program 2
#include <stdio.h>
#include <stdlib.h>
int main()
{
char ch;
//input character from user
printf("Input any character: ");
scanf("%c",&ch);
if(ch >=65 && ch<= 90)
{//check if the given Alphabets is upper case
printf("'%c' is an Upper case Alphabet",ch);
}
else if(ch >=97 && ch<= 122)
{//check if the given Alphabets is lower case
printf("'%c' is a Lower case Alphabet",ch);
}
else{
printf("'%c' is not an Alphabet",ch);
}//Display, if the character is not an English alphabet
getch();
return 0;
}
When the above code is executed, it produces the following result
Case 1
Input any character: Y 'Y' is an Upper case Alphabet
Case 2
Input any character: u 'u' is a Lower case Alphabet
Case 3
Input any character: $ '$' is not an Alphabet
Code to find given character Upper or Lower or not, using library functions
In this code, we are going to learn how to check the given character is Upper case or lower case or not using predefined library function in C language
Program 3
#include <stdio.h>
#include <ctype.h>
int main()
{
char ch;
//input character from user
printf("Input any character: ");
scanf("%c",&ch);
if(isupper(ch))
{//check if the given Alphabets is upper case
printf("'%c' is an Upper case Alphabet",ch);
}
else if(islower(ch))
{//check if the given Alphabets is lower case
printf("'%c' is a Lower case Alphabet",ch);
}
else{
printf("'%c' is not an Alphabet",ch);
}//Display, if the character is not an English alphabet
getch();
return 0;
}
When the above code is executed, it produces the following result
Case 1
Input any character: D 'D' is an Upper case Alphabet
Case 2
Input any character: j 'j' is a Lower case Alphabet
Case 3
Input any character: * '*' is not an Alphabet
Code to find given character Upper or Lower or not, using function
In this code, we are going to learn how to check the given character is Upper case or lower case or not using user-defined function in C language
Program 3
#include <stdio.h>
#include <stdlib.h>
void Ulcase(char ch);
//function prototype
int main()
{
char ch;
//character declaration
//input character from user
printf("Input any character: ");
scanf("%c",&ch);
Ulcase(ch);
//Caling the function
return 0;
}
void Ulcase(char ch){//function definition
if(ch >=65 && ch<= 90)
{//check if the given Alphabets is upper case
printf("'%c' is an Upper case Alphabet",ch);
}
else if(ch >=97 && ch<= 122)
{//check if the given Alphabets is lower case
printf("'%c' is a Lower case Alphabet",ch);
}
else{
printf("'%c' is not an Alphabet",ch);
}//Display, if the character is not an English alphabet
getch();
}
When the above code is executed, it produces the following result
Case 1
Input any character: K 'K' is an Upper case Alphabet
Case 2
Input any character: i 'i' is a Lower case Alphabet
Case 3
Input any character: % '%' is not an Alphabet
Code to find given character Upper or Lower or not, using pointer
In this code, we are going to learn how to check the given character is Upper case or lower case or not using pre-defined function with pointer in C language
Program 5
#include <stdio.h>
#include <stdlib.h>
void Ulcase(char *ch);
//function prototype with pointer argument
int main()
{
char ch;
//character declaration
//input character from user
printf("Input any character: ");
scanf("%c",&ch);
Ulcase(&ch);
//Calling the function
return 0;
}
void Ulcase(char *ch){//function definition
if(*ch >=65 && *ch<= 90)
{//check if the given Alphabets is upper case
printf("Upper case Alphabet");
}
else if(*ch >=97 && *ch<= 122)
{//check if the given Alphabets is lower case
printf("Lower case Alphabet");
}
else{
printf("it is not an Alphabet");
}//Display, if the character is not an English alphabet
getch();
}
When the above code is executed, it produces the following result
Case 1
Input any character: D Upper case Alphabet
Case 2
Input any character: n Lower case Alphabet
Case 3
Input any character: % it is not an Alphabet
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