# Functions in C Hacker Rank Solution

Hello coders, In this post, you will learn how to solve the Functions in C Hacker Rank Solution. This problem is a part of the HackerRank C Programming Series.

## Functions in C Hacker Rank Solution

### Objective

In this challenge, you will learn simple usage of functions in C. Functions are a bunch of statements glued 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

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

You have to 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.

```+= : 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;
```

#### Input Format

Input will contain four integers –  a,b,c,d one in 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 Hacker Rank Solution

```#include <stdio.h>
int max_of_four(int,int,int,int);
/*
Add `int max_of_four(int a, int b, int c, int d)` here.
*/
// Functions in C - Hacker Rank Solution START
int max_of_four(int a,int b,int c,int d)
{
int gre;
if(a>b && a >c && a >d)
gre = a;
else if(b>a && b>c && b>d)
gre = b;
else if(c>a && c>b && c>d)
gre = c;
else if(d>a && d>b && d>c)
gre = d;
else if(a=b=c=d)
gre = a;
return gre;
}
// Functions in C - Hacker Rank Solution END
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;
}```

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