**(HackerRank) Write a Modular C Programming code to solve Finding Primes, Write a user-defined function checkprime() to check the roll number of a student in a classroom is a prime.**

Karan was late to school by 15 minutes. The teacher punished him to perform the following task:

The teacher told him to go to each classroom of different divisions, call out all the students whose roll number is prime and collect Rs. 10/- from each.

Karan has to collect money and give away a treat to his classmates and teacher.

Find out how much maximum money he collects.

Additional Info:

Write a user-defined function checkprime() to check the roll number of a student in a classroom is a prime.

**Input Format**

N – a number.

**Constraints**

N should be greater than 1 and less than 70.

**Output Format**

Students with prime roll numbers.

Money collected.

**Sample Input 0**

```
5
```

**Sample Output 0**

```
Students with prime roll numbers = 2 3 5
Money collected = 30
```

**Sample Input 1**

```
1
```

**Sample Output 1**

```
Invalid input
```

**Sample Input 2**

```
70
```

**Sample Output 2**

```
Students with prime roll numbers = 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67
Money collected = 190
```

**Sample Input 3**

```
-5
```

**Sample Output 3**

```
Invalid input
```

**Sample Input 4**

```
25
```

**Sample Output 4**

```
Students with prime roll numbers = 2 3 5 7 11 13 17 19 23
Money collected = 90
```

**Refer :** C Programming HackerRank all solutions for Loops | Arrays | strings

**CODE:**

#include<stdio.h> #include<stdlib.h> #include<string.h> #include<math.h> void prime(int n) { int count=0,i,j,status=0; printf("Students with prime roll numbers ="); for(i=2;i<=n;i++) { status=1; for(j=2;j<i;j++) { if(i%j==0) { status = 0; break; } } if(status==1) { printf(" %d",i); count++; } } printf("\nMoney collected = %d",count*10); } int main() { int n; scanf("%d",&n); if(n<2||n>70) { printf("Invalid input"); exit(0); } prime(n); return 0; }

**OUTPUT**

Congratulations, you passed the sample test case. Click the Submit Code button to run your code against all the test cases. Input (stdin) 5 Your Output (stdout) Students with prime roll numbers = 2 3 5 Money collected = 30 Expected Output Students with prime roll numbers = 2 3 5 Money collected = 30

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