Palindrome Number

Algorithm

Step 1: Start

Step 2: Declare integers n, t, t1, sum, count, digit

Step 3: Take input for number (n)

Step 4: Reverse the number and count digits

Step 5: Check if the reversed number is equal to original

Step 6: Print whether it is a Palindrome or not

Step 7: End

Flowchart

graph TD; A([Start]) --> B[/Input n/]; B --> C[Initialize sum=0, count=0]; C --> D[Store t1 = n]; D --> E{n != 0?}; %% Decision Section E --> |No| J{sum == t1?}; J -- Yes --> K[/Print: Palindrome Number/]; J -- No --> L[/Print: Not a Palindrome/]; K --> M([End]); L --> M([End]); %% Loop Section E ----> |Yes| F[Extract last digit]; F --> G[sum = sum * 10 + digit]; G --> H[Reduce n = n / 10]; H --> I[Increment count]; I ----> E; %% Define styles classDef start fill:#00cc44,stroke:#006622,stroke-width:2px,color:#ffffff; classDef stop fill:#ff4444,stroke:#cc0000,stroke-width:2px,color:#ffffff; classDef input_output fill:#ffdd44,stroke:#cc9900,stroke-width:2px,color:#000000; classDef process fill:#4488ff,stroke:#0044cc,stroke-width:2px,color:#ffffff; classDef decision fill:#ff8844,stroke:#cc4400,stroke-width:2px,color:#ffffff; classDef loop fill:#8888ff,stroke:#5555ff,stroke-width:2px,color:#ffffff; %% Apply styles class A start; class M stop; class B,K,L input_output; class C,D,F,G,H,I process; class E,J decision; class F,G,H,I loop;

Program

#include<stdio.h>
#include<math.h>
int main()
{
    int n, t, t1, sum = 0, count = 0, digit;
    printf("Enter a number :");
    scanf("%d", &n);
    
    t = n;
    t1 = n;
    
    while(n != 0)
    {
        digit = n % 10;
        sum = sum * 10 + digit;
        n = n / 10;
        count++;
    } 
    
    printf("\n Number of digits in %d : %d", t1, count);
    printf("\n Reversed number: %d", sum);
    
    if(sum == t1)
    {
        printf("\n %d is a Palindrome Number", t1);
    }
    else
    {
        printf("\n %d is Not a Palindrome Number", t1);
    }
    return 0;
}

Test Case Output

Enter a number: 121

Number of digits in 121: 3
Reversed number: 121
121 is a Palindrome Number