This article shows the result of how to display all the magic numbers between 1 to nth number in C programming.

**What is Magic Number?**

A number is said to be a **Magic** **Number **if the **sum of the digits **of that number, when multiplied by the reverse number of the sum of its digits, is **equal **to the **original number**.

**Example**: **1729 **is a magic number.

**C Program to print all Magic Numbers till N.**

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | #include <stdio.h> #include <stdlib.h> int main() { int num, temp, i; printf("Enter the last number you want to check between 1 to:"); scanf("%d", &num); //loop to check all the number for (i = 1; i <= num; i++) { int revnum = 0; int sumOfDigits = 0; temp = i; //calculate sum of the digits while (temp > 0) { sumOfDigits += temp % 10; temp = temp / 10; } //reversing the digits temp = sumOfDigits; while (temp > 0) { revnum = revnum *10 + temp % 10; temp = temp / 10; } //displaying the result if (revnum *sumOfDigits == i) printf(" %d", i); } return 0; } |

The **output **of magic Number in C: