# Functions in C HackerRank Solution

Hello Friends in this article i am gone to share Hackerrank C programming Solutions with you. | Functions in C Hackerrank Solution

### Objective

In this challenge, you will learn simple usage of functions in C. Functions are a bunch of statements grouped together. A function is provided with zero or more arguments, and it executes the statements on it. Based on the return type, it either returns nothing (void) or something.

A sample syntax for a function is

```return_type function_name(arg_type_1 arg_1, arg_type_2 arg_2, ...) {
...
...
...
[if return_type is non void]
return something of type `return_type`;
}```

For example, a function to read four variables and return the sum of them can be written as

```int sum_of_four(int a, int b, int c, int d) {
int sum = 0;
sum += a;
sum += b;
sum += c;
sum += d;
return sum;
}```
```+= : Add and assignment operator. It adds the right operand to the left operand and assigns the result to the left operand.

a += b is equivalent to a = a + b;```

Write a function int max_of_four(int a, int b, int c, int d) which reads four arguments and returns the greatest of them.

### Note

There is not built in max function in C. Code that will be reused is often put in a separate function, e.g. int max(x, y) that returns the greater of the two values.

### Input Format

Input will contain four integers – a,b,c,d, one on each line.

### Output Format

Print the greatest of the four integers.
Note: I/O will be automatically handled.

```3
4
6
5```

`6`

## Functions in C Hackerrank Solution

```#include <stdio.h>
/* Add `int max_of_four(int a, int b, int c, int d)` here. */

int max_of_four(int a,int b,int c,int d){
if(a>b && a>c && a>d) return a;
else if(b>c && b>d) return b;
else if(c>d) return c;
else return d;
}

int main() {
int a, b, c, d;
scanf("%d %d %d %d", &a, &b, &c, &d);
int ans = max_of_four(a, b, c, d);
printf("%d", ans);

return 0;
}```