- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
- C Area Perimeter of Rectangle
- C Area Circum of Circle
- C Fahrenheit to Celsius
- C Celsius to Fahrenheit
- C Inches to Centimeters
- C Kilogram to Gram
- C Reverse a Number
- C Swap Two Numbers
- C Interchange Numbers
- C Print ASCII Value
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Find Armstrong Numbers
- C Find nCr and nPr
- C Find Profit Loss
- C Sum of their Square
- C First & Last Digit Sum
- C Sum of All Digit
- C Product of All Digit
- C Print Total Digit in Number
- C Check Perfect Number
- C Find Basic Gross Salary
- C Round Number to Integer
- C Print Series upto n Term
- C Find Factors of Number
- C if-else & Loop Programs
- C Check Even or Odd
- C Check Prime or Not
- C Check Alphabet or Not
- C Check Vowel or Not
- C Check Leap Year or Not
- C Is Reverse Equal Original
- C Make Calculator
- C Add Digits of Number
- Count Positive Negative Zero
- C Largest of Two Numbers
- C Largest of Three Numbers
- C Smallest of Two Numbers
- C Smallest of Three Numbers
- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Find Discount Purchase
- C Calculate Parcel Charge
- C Calculate Wage of Labor
- C Print Phone Bill
- C Conversion programs
- C Decimal to Binary
- C Decimal to Octal
- C Decimal to Hexadecimal
- C Binary to Decimal
- C Binary to Octal
- C Binary to Hexadecimal
- C Octal to Decimal
- C Octal to Binary
- C Octal to Hexadecimal
- C Hexadecimal to Decimal
- C Hexadecimal to Binary
- C Hexadecimal to Octal
- C Pattern Programs
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd's Triangle
- C Print Pascal's Triangle
- C Array Programs
- C 1D Array Programs
- C Linear Search
- C Binary Search
- C Largest Element in Array
- C Smallest Element in Array
- C Second Largest/Smallest
- C Count Even Odd
- C Array Element at Even
- C Array Element at Odd
- C Print Even Array Elements
- C Print Odd Array Elements
- C Sum/Product of Even/Odd
- C Reverse an Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge Two Arrays
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Print Common Elements
- C 2D Array Programs
- C Add Two Matrices
- C Subtract Two Matrices
- C Transpose a Matrix
- C Multiply Two Matrices
- C Sum All Matrix Elements
- C Largest Element in Matrix
- C Print Row Column Total
- C 3D Array Programs
- C String Programs
- C Print String
- C Find Length of String
- C Compare Two String
- C Copy a String
- C Concatenate String
- C Reverse a String
- C Count Vowels Consonants
- C Replace Vowel in String
- C Delete Vowels from String
- C Delete Word from String
- C Frequency of Character
- C Count Word in String
- C Remove Spaces from String
- C Sort a String
- C Sort String in Alphabetical
- C Sort Words in Ascending
- C Sort Words in Descending
- C Uppercase to Lowercase
- C Lowercase to Uppercase
- C Swap Two Strings
- C Check Anagram or Not
- C Check Palindrome String
- C Print Number in Words
- C Print Successive Character
- C Character without Space
- C Remove Extra Spaces
- C File Programs
- C Read a File
- C Write Content to File
- C Read & Display File
- C Copy a File
- C Merge Two Files
- C Reverse File
- C Count All Character in File
- C List Files in Directory
- C Encrypt & Decrypt a File
- C Delete a File
- C Misc Programs
- Generate Random Numbers
- C Print Date Time
- C Print Message with Time
- C Get IP Address
- C Print Smiling face
- C Pass Array to Function
- Add Two Numbers using Pointer
- C Address of Variable
- C Shutdown Computer
- C Programming Tutorial
- C Tutorial
- C Programming Library
- C Standard Library
- C Programming Test
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- All Test List
C Program to Check Alphabet or Not
In this article, you will learn and get code about checking whether the given character by user (at run-time) is an alphabet or not. There are two version of the same program:
- Program to Check Alphabet using the Character itself
- Program to Check Alphabet using the ASCII value of Character
Check Alphabet in C
The question is, write a program in C to check whether the given input is alphabet or not. The answer to this question is given below. This program uses the character itself (provided by user at run-time) to check whether it is an alphabet or not.
All the character lies between a-z or A-z (including a, z, A, Z) are alphabets. So to check whether the input character is an alphabet or not alphabet in C programming, you have to ask from user to enter a character and then check whether it lies between a-z or A-Z or not. If it it, then it is an alphabet, otherwise it is not an alphabet. Let's take a look at the program given below:
#include<stdio.h> #include<conio.h> int main() { char ch; printf("Enter a Character: "); scanf("%c", &ch); if((ch>='a' && ch<='z') || (ch>='A' && ch<='Z')) printf("\n%c is an Alphabet", ch); else printf("\n%c is not an Alphabet", ch); getch(); return 0; }
This program was compiled and executed using Code::Blocks IDE. Here is the sample run:
Now supply any character as input say c and press ENTER key to see the output as shown in the snapshot given below:
As c lies between a-z. So it is an alphabet. Let's take a look at another sample run, where user enters any character that does not lies between a-z and A-Z say - (dash or minus, whatever you understand it). Here is the sample run:
Check Alphabet using ASCII Value in C
The question is, write a program in C that takes any character as input and use ASCII value of this character to check whether it is an alphabet or not.
Here is the ASCII table of uppercase alphabet:
Character | ASCII Value |
---|---|
A | 65 |
B | 66 |
C | 67 |
... | ... |
Z | 90 |
And the ASCII table of lowercase alphabet:
Character | ASCII Value |
---|---|
a | 97 |
b | 98 |
c | 99 |
... | ... |
z | 122 |
Now use the above ASCII table to check for alphabet as shown in the program given below:
#include<stdio.h> #include<conio.h> int main() { char ch; int ascii; printf("Enter a Character: "); scanf("%c", &ch); ascii = ch; if((ascii>=97 && ascii<=122) || (ascii>=65 && ascii<=90)) printf("\n%c is an Alphabet", ch); else printf("\n%c is not an Alphabet", ch); getch(); return 0; }
Here is the sample run of this program:
As you can see from the above program, if you initialize any character say ch (contains Y) as its value, to an integer variable say ascii, then the ASCII value of ch (121, ASCII code of Y) gets initialized to ascii variable. So if ch holds A as its value, then using the statement ascii = ch;, 65 gets initialized to ascii. Therefore, use if-else case to check and print whether it is an alphabet or not.
You can also check it directly with ch variable itself without using any extra variable like ascii (used in above program). Here extra variable say ascii is only used to make it more simple to understand.
Same Program in Other Languages
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