- C++ Programming Examples
- C++ Programming Examples
- C++: Hello World
- C++: Get Input
- C++: Print Integer
- C++: Add two numbers
- C++: Add, Sub, Multiply, Div
- C++: Add Digits
- C++: Find Average and Percentage
- C++: Find Arithmetic Mean
- C++: Sum of n Natural Numbers
- C++: Sum of n Numbers
- C++: Square's Area and Perimeter
- C++: Rectangle's Area and Perimeter
- C++: Triangle's Area and Perimeter
- C++: Area and Circumference
- C++: Find Simple Interest
- C++: Fahrenheit to Celsius
- C++: Celsius to Fahrenheit
- C++: Print Prime Numbers
- C++: Reverse a Number
- C++: Swap Two Numbers
- C++: Print Multiplication Table
- C++: Find Factorial of a Number
- C++: Find Factors of a Number
- C++: Find HCF and LCM
- C++: Create a Calculator
- C++: Count Digits in a Number
- C++: First and Last Digit Sum
- C++: Product of Number Digits
- C++: Sum of Squares of Digits
- C++: Interchange Digits of Number
- C++ if-else 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++: Check Reverse equals Original
- C++: Check Perfect Number
- C++: Check Palindrome or Not
- C++: Check Armstrong or Not
- C++: Divisibility Test
- C++: Find Labor Wage
- C++: Find Discounted Price
- C++: Find Shipping Charge
- C++: Find Telephone Bills
- C++: Calculate Student Grade
- C++: Largest of Two Numbers
- C++: Largest of Three Numbers
- C++ Number Conversion
- 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 Programs
- C++: Print Diamond Pattern
- C++: Print Floyd's Triangle
- C++: Print Pascal's Triangle
- C++ Array Programs
- C++: 1D Array Program
- C++: Linear Search
- C++: Binary Search
- C++: Largest Element in an Array
- C++: Smallest Element in an Array
- C++: Find Second Largest Element
- C++: Find Second Smallest Element
- C++: Sum of All Elements
- C++: Multiply All Elements
- C++: Element in Even Position
- C++: Element in Odd Position
- C++: Print Even Numbers in Array
- C++: Print Odd Numbers in Array
- C++: Count Even or Odd Numbers
- C++: Sum of Even or Odd Numbers
- C++: Count Positive, Negative, Zero
- C++: Reverse an Array
- C++: Insert an Element
- C++: Delete an Element
- C++: Merge two Arrays
- C++: Bubble Sort
- C++: Selection Sort
- C++: Insertion Sort
- C++: Common Elements
- C++: 2D Array Programs
- C++: Add Two Matrices
- C++: Subtract Two Matrices
- C++: Transpose Matrix
- C++: Multiply Two Matrices
- C++: 3D Array Programs
- C++ String Programs
- C++: Print String
- C++: Find String Length
- C++: Compare Two Strings
- C++: Copy String
- C++: String Concatenation
- C++: Reverse a String
- C++: Delete Vowels from a String
- C++: Delete a Word from a String
- C++: Count Characters in a String
- C++: Count Words in a String
- C++: Frequency of Words
- C++: Remove Spaces from Strings
- C++: Sort a String
- C++: Uppercase to Lowercase
- C++: Lowercase to Uppercase
- C++: Swap Two Strings
- C++: Check the Anagram or Not
- C++: Capitalize All Words in a String
- C++: Get Numbers from a String
- C++ File Programs
- C++: Read a File
- C++: Write Content to a File
- C++: Append Data to a File
- C++: Read and Display File
- C++: Copy a File
- C++: Merge Two Files
- Count Characters in a File
- C++: Capitalize Every Word
- C++: List Files in Directory
- C++: Delete a File
- C++: Encrypt and Decrypt a File
- C++ Misc Programs
- C++: Print ASCII Value
- C++: Add Binary Numbers
- C++: Generate Random Numbers
- C++: Print a Smiling Face
- C++: Days into Years and Months
- C++: Add Two Numbers using Pointer
- C++: Print Fibonacci Series
- C++: Generate Armstrong Numbers
- C++: Find nCr and nPr
- C++: Get IP Address
- C++: Print Date and Time
- C++: Shutdown and Restart Computer
- C++ Programming Tutorial
- C++ Tutorial
C++ program to check palindrome numbers
In this article, you will learn and get code to check whether a number entered by the user (at run-time) is a palindrome number or not in C++. Here is the list of programs for checking palindrome numbers:
- Check if a number is a palindrome or not without using a function
- Check if a number is a palindrome number using a user-defined function
What is a palindrome number?
If the inverse of a number is equal to the number itself, then it is called a palindrome number. For example, 121, 15751, etc.
Check if a number is a palindrome without using a function
To check whether a number given by the user is a palindrome number or not in C++, first receive the number, initialize its value to a variable, say temp, and reverse the value of temp. After reversing, check whether the original number is equal to temp or not.
That is, if the original number is equal to the value of rev (the original number's reverse or temp's reverse), then print a message like, it is a palindrome number, otherwise print a message like, it is not a palindrome number, as shown in the program given below:
#include<iostream> using namespace std; int main() { int num, rev=0, rem, temp; cout<<"Enter the Number: "; cin>>num; temp = num; while(temp>0) { rem = temp%10; rev = (rev*10)+rem; temp = temp/10; } if(rev==num) cout<<"\nIt is a Palindrome Number"; else cout<<"\nIt is not a Palindrome Number"; cout<<endl; return 0; }
This program was built and runs under the Code::Blocks IDE. Here is its sample run:
Now supply the input, say 12321, and press the ENTER key to check and print whether it is a palindrome number or not, as shown in the snapshot given below:
Here is another sample run with user input, 12345:
In the above program, we have initialized the original number stored in num to temp. The value of temp is then reversed. Finally, we compared the reversed value (value of rev) to the original number (value of num). If it is found to be equal, then print it as a palindrome number; otherwise, print it as a non-palindrome number.
To learn more about reversing a number, refer to C++ Program to Reverse a Number article. It contains all of the necessary information.
Check if a number is a palindrome number using a function
The question is: write a program in C++ that checks for palindromes or not using a user-defined function? Here is its answer:
#include<iostream> using namespace std; int checkPalindrome(int); int main() { int num, val; cout<<"Enter the Number: "; cin>>num; val = checkPalindrome(num); if(val==0) cout<<"\nIt is a Palindrome Number"; else cout<<"\nIt is not a Palindrome Number"; cout<<endl; return 0; } int checkPalindrome(int n) { int temp, rem, rev=0; temp = n; while(temp>0) { rem = temp%10; rev = (rev*10)+rem; temp = temp/10; } if(rev==n) return 0; else return 1; }
Here is its sample run with user input, 55:
The same program in different languages
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