C Program to Check Whether a Number is Palindrome or Not

This program reverses an integer (entered by the user) using while loop. Then, if statement is used to check whether the reversed number is equal to the original number or not.

To understand this example, you should have the knowledge of following C programming topics:

An integer is a palindrome if the reverse of that number is equal to the original number.

Example: Program to Check Palindrome

#include <stdio.h>
int main()
{
    int n, reversedInteger = 0, remainder, originalInteger;

    printf("Enter an integer: ");
    scanf("%d", &n);

    originalInteger = n;

    // reversed integer is stored in variable 
    while( n!=0 )
    {
        remainder = n%10;
        reversedInteger = reversedInteger*10 + remainder;
        n /= 10;
    }

    // palindrome if orignalInteger and reversedInteger are equal
    if (originalInteger == reversedInteger)
        printf("%d is a palindrome.", originalInteger);
    else
        printf("%d is not a palindrome.", originalInteger);
    
    return 0;
}

Output

Enter an integer: 1001
1001 is a palindrome.

Comments

C Program to Compute Quotient and Remainder

C Program to Compute Quotient and Remainder This program evaluates the quotient and remainder when an integer is divided by another integer. To understand this example, you should have the knowledge of following C programming topics: C Programming Data Types C Programming Constants and Variables C Input Output (I/O) C Programming Operators Program to Compute Quotient and Remainder #include <stdio.h> int main (){ int dividend , divisor , quotient , remainder ; printf ( "Enter dividend: " ); scanf ( "%d" , & dividend ); printf ( "Enter divisor: " ); scanf ( "%d" , & divisor ); // Computes quotient quotient = dividend / divisor ; // Computes remainder remainder = dividend % divisor ; printf ( "Quotient = %d\n" , quotient ); printf ( "Remainder = %d" , remainder ); return 0 ; } ...

C Program to Find all Roots of a Quadratic Equation

C Program to Find all Roots of a Quadratic Equation This program accepts coefficients of a quadratic equation from the user and displays the roots (both real and complex roots depending upon the discriminant ). To understand this example, you should have the knowledge of following C programming topics: C Programming Operators C if...else Statement The standard form of a quadratic equation is: ax 2 + bx + c = 0, where a, b and c are real numbers and a ≠ 0 The term b 2 -4ac is known as the discriminant of a quadratic equation. The discriminant tells the nature of the roots. If discriminant is greater than 0, the roots are real and different. If discriminant is equal to 0, the roots are real and equal. If discriminant is less than 0, the roots are complex and different. Example: Program to Find Roots of a Quadratic Equation #include <stdio.h> #include <math.h> int main () ...

C Program to Check Whether a Number is Prime or Not

C Program to Check Whether a Number is Prime or Not Example to check whether an integer (entered by the user) is a prime number or not using for loop and if...else statement. To understand this example, you should have the knowledge of following C programming topics: C if...else Statement C Programming for Loop C Programming break and continue Statement A prime number is a positive integer which is divisible only by 1 and itself. For example: 2, 3, 5, 7, 11, 13 Example: Program to Check Prime Number #include <stdio.h> int main () { int n , i , flag = 0 ; printf ( "Enter a positive integer: " ); scanf ( "%d" , & n ); for ( i = 2 ; i <= n / 2 ; ++ i ) { // condition for nonprime number if ( n % i == 0 ) { flag = 1 ; break ; } } if ( n == 1 ) { printf ( "1 is neither a prime nor a comp...

CodeSmart Pro

Search This Blog