# Calculate the Nth term – Hacker Rank Solution | HackerRank Programming Solutions | HackerRank C Solutions

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C is one of the most widely used Programming Languages. it is basically used to build Operating System. C was developed by Dennis Ritchie in 1972. Below are some examples of C Programming which might you understanding the basics of C Programming.

#### Objective

This challenge will help you learn the concept of recursion.A function that calls itself is known as a recursive function. The C programming language supports recursion. But while using recursion, one needs to be careful to define an exit condition from the function, otherwise it will go into an infinite loop.To prevent infinite recursion,if….else statement (or similar approach) can be used where one branch makes the recursive call and other doesn’t.

There is a series,S, where the next term is the sum of pervious three terms. Given the first three terms of the series, a, b, and c respectively, you have to output the nth term of the series using recursion.Recursive method for calculating nth term is given below.

#### Input Format

• The first line contains a single integer, n.
• The next line contains 3 space-separated integers, ab, and c.

#### Constraints

• 1<=n<=20
• 1<=a,b,c<=100

#### Output Format

Print the nth term of the series, S(n).

```5
1 2 3
```

```11
```

#### Explanation 0

Consider the following steps:

1. S(1) = 1
2. S(2) = 2
3. S(3) = 3
4. S(4) = S(3)+S(2)+S(1)
5. S(5) = S(4)+S(3)+S(2)

From steps 1,2,3 and 4, we can say S(4) = 3+2+1 = 6; Then using value from step 2,3,4, and 5, we get S(5) = 6+3+2 = 11; Thus we print the 11 as our answer.

`Calculate the Nth term – Hacker Rank Solution`
```#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
//Complete the following function.

int find_nth_term(int n, int a, int b, int c) {
//Write your code here.
int i,arr;
arr=a;
arr=b;
arr=c;
for(i=4;i<=n;i++)
{
arr[i]=arr[i-1]+arr[i-2]+arr[i-3];
}
return arr[n];
}

int main() {
int n, a, b, c;

scanf("%d %d %d %d", &n, &a, &b, &c);
int ans = find_nth_term(n, a, b, c);

printf("%d", ans);
return 0;
}``` #### Ads Blocker Detected!!!

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