Merge pull request #1315 from VanshGarg06/VanshGarg06-patch-21

Algorithm for Armstrong Number from 1 to N

Mathematical Algorithms/Armstrong Number/Armstrong_number.c

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+//Objective: To find the Armstrong Number from 1 to n
+//Input parameters: the value of n
+//Output parameters: the armstrong numbers from 1 to n
+#include<stdio.h>
+#include<math.h>
+
+//Function to calculate power of a number
+int power(int number,int exponent){
+    int prod=1;
+    for(int i=0;i<exponent;i++){
+        prod = prod*number;
+    }
+    return prod;
+}
+
+
+int main(){
+    int n,num,sum,counter;
+    //Taking user input for the n
+    printf("Enter the value of n:");
+    scanf("%d",&n);
+    //Printing all the armstrong numbers
+    printf("The Armstrong numbers are:\n");
+    for(int i=1;i<=n;i++){
+        num = i;
+        sum = 0;
+        counter=0;
+        //Calculating the number of digits
+        while(num>0){
+            counter++;
+            num = num/10;
+        }
+        num = i;
+        //Evaluating whether the number in range is Armstrong or not
+        if(counter>3){
+            while(num>0){
+                int digit = num%10;
+                sum = sum+power(digit,counter);
+                num=num/10;
+            }
+        }
+        else{
+            while(num>0){
+                int digit = num%10;
+                sum = sum+power(digit,3);
+                num=num/10;
+            }
+        }
+        //Armstrong number is number if the sum of the length number(cube i.e 3 in case of 132) of the digit
+        //is equal to number
+        if(sum==i){
+            printf("%d ",i);
+        }
+    }
+    return 0;
+}

Mathematical Algorithms/Armstrong Number/Readme.md

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+# Armstrong Number
+
+## Problem Description
+
+The Armstrong number is the number in which the sum of the digits of power length of the number.
+The number is equal to the number got from the summation of the cube of the number.
+
+## Example
+
+If the User entered any number like 153 then we will calculate the sum of the cube of the digits of the number
+like 153 -> (3)^3 + (5)^3 + (1)^3  = 153. 
+So, 153 is an armstrong number.
+
+## Additional Context
+
+This is the problem statement which is commonly asked in many interviews for various roles.