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C Exercises: Display the number in reverse order

C For Loop: Exercise-37 with Solution

Write a program in C to display the number in reverse order.

Pictorial Presentation:

 Display the number in reverse order

Sample Solution:

C Code:

#include <stdio.h>

void main(){
    int num,r,sum=0,t;

    printf("Input a number: ");
    scanf("%d",&num);

    for(t=num;num!=0;num=num/10){
         r=num % 10;
         sum=sum*10+r;
    }
printf("The number in reverse order is : %d \n",sum);
}

Sample Output:

Input a number: 12345                                                                                         
The number in reverse order is : 54321 

Flowchart:

Flowchart : Display the number in reverse order.

C Programming Code Editor:

Improve this sample solution and post your code through Disqus.

Previous: Write a program in C to display the such a pattern for n number of rows using a number which will start with the number 1 and the first and a last number of each row will be 1.
Next: Write a program in C to check whether a number is a palindrome or not.

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C Programming: Tips of the Day

Is there a way to specify how many characters of a string to print out using printf()?

The basic way is:

printf ("Here are the first 8 chars: %.8s\n", "A string that is more than 8 chars");

The other, often more useful, way is:

printf ("Here are the first %d chars: %.*s\n", 8, 8, "A string that is more than 8 chars");

Here, you specify the length as an int argument to printf(), which treats the '*' in the format as a request to get the length from an argument.

You can also use the notation:

printf ("Here are the first 8 chars: %*.*s\n",
        8, 8, "A string that is more than 8 chars");

This is also analogous to the "%8.8s" notation, but again allows you to specify the minimum and maximum lengths at runtime - more realistically in a scenario like:

printf("Data: %*.*s Other info: %d\n", minlen, maxlen, string, info);

The POSIX specification for printf() defines these mechanism

Ref : https://bit.ly/3u32GyO