# Count Even and Odd numbers in a range

Here given code implementation process.

```
// C program
// Count Even and Odd numbers in a range
#include <stdio.h>
//Count the number of Even and Odd elements in given range
void count_even_odd(int first, int last)
{
if (first > last)
{
//Transform into a valid range
count_even_odd(last, first);
}
else
{
int even = 0;
int odd = 0;
//Count number of element
int length = (last - first) + 1;
if (first % 2 == 0)
{
if (last % 2 == 0)
{
//When both given number is even
even = (length / 2) + 1;
}
else
{
even = length / 2;
}
odd = length - even;
}
else
{
if (last % 2 != 0)
{
odd = (length / 2) + 1;
}
else
{
odd = length / 2;
}
even = length - odd;
}
printf("\n Range [%d,%d] : Even [%d], Odd [%d] ", first, last, even,odd);
}
}
int main()
{
//Test case
count_even_odd(2, 8);
count_even_odd(1, 10);
count_even_odd(21, 33);
count_even_odd(7, 29);
count_even_odd(0, 0);
return 0;
}
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
/*
Java program
Count Even and Odd numbers in a range
*/
class EvenOddNumber
{
//Count the number of Even and Odd elements in given range
public void count_even_odd(int first, int last)
{
if (first > last)
{
//Transform into a valid range
count_even_odd(last, first);
}
else
{
int even = 0;
int odd = 0;
//Count number of element
int length = (last - first) + 1;
if (first % 2 == 0)
{
if (last % 2 == 0)
{
//When both given number is even
even = (length / 2) + 1;
}
else
{
even = length / 2;
}
odd = length - even;
}
else
{
if (last % 2 != 0)
{
odd = (length / 2) + 1;
}
else
{
odd = length / 2;
}
even = length - odd;
}
System.out.print("\n Range [" + first + "," + last + "] : Even [" + even + "], Odd [" + odd + "] ");
}
}
public static void main(String[] args)
{
EvenOddNumber obj = new EvenOddNumber();
//Test case
obj.count_even_odd(2, 8);
obj.count_even_odd(1, 10);
obj.count_even_odd(21, 33);
obj.count_even_odd(7, 29);
obj.count_even_odd(0, 0);
}
}
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
//Include header file
#include <iostream>
using namespace std;
/*
C++ program
Count Even and Odd numbers in a range
*/
class EvenOddNumber
{
public:
//Count the number of Even and Odd elements in given range
void count_even_odd(int first, int last)
{
if (first > last)
{
//Transform into a valid range
this->count_even_odd(last, first);
}
else
{
int even = 0;
int odd = 0;
//Count number of element
int length = (last - first) + 1;
if (first % 2 == 0)
{
if (last % 2 == 0)
{
//When both given number is even
even = (length / 2) + 1;
}
else
{
even = length / 2;
}
odd = length - even;
}
else
{
if (last % 2 != 0)
{
odd = (length / 2) + 1;
}
else
{
odd = length / 2;
}
even = length - odd;
}
cout << "\n Range [" << first << "," << last << "] : Even [" << even << "], Odd [" << odd << "] ";
}
}
};
int main()
{
EvenOddNumber obj = EvenOddNumber();
//Test case
obj.count_even_odd(2, 8);
obj.count_even_odd(1, 10);
obj.count_even_odd(21, 33);
obj.count_even_odd(7, 29);
obj.count_even_odd(0, 0);
return 0;
}
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
//Include namespace system
using System;
/*
C# program
Count Even and Odd numbers in a range
*/
class EvenOddNumber
{
//Count the number of Even and Odd elements in given range
public void count_even_odd(int first, int last)
{
if (first > last)
{
//Transform into a valid range
count_even_odd(last, first);
}
else
{
int even = 0;
int odd = 0;
//Count number of element
int length = (last - first) + 1;
if (first % 2 == 0)
{
if (last % 2 == 0)
{
//When both given number is even
even = (length / 2) + 1;
}
else
{
even = length / 2;
}
odd = length - even;
}
else
{
if (last % 2 != 0)
{
odd = (length / 2) + 1;
}
else
{
odd = length / 2;
}
even = length - odd;
}
Console.Write("\n Range [" + first + "," + last + "] : Even [" + even + "], Odd [" + odd + "] ");
}
}
public static void Main(String[] args)
{
EvenOddNumber obj = new EvenOddNumber();
//Test case
obj.count_even_odd(2, 8);
obj.count_even_odd(1, 10);
obj.count_even_odd(21, 33);
obj.count_even_odd(7, 29);
obj.count_even_odd(0, 0);
}
}
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
<?php
/*
Php program
Count Even and Odd numbers in a range
*/
class EvenOddNumber
{
//Count the number of Even and Odd elements in given range
public function count_even_odd($first, $last)
{
if ($first > $last)
{
//Transform into a valid range
$this->count_even_odd($last, $first);
}
else
{
$even = 0;
$odd = 0;
//Count number of element
$length = ($last - $first) + 1;
if ($first % 2 == 0)
{
if ($last % 2 == 0)
{
//When both given number is even
$even = (intval($length / 2)) + 1;
}
else
{
$even = intval($length / 2);
}
$odd = $length - $even;
}
else
{
if ($last % 2 != 0)
{
$odd = (intval($length / 2)) + 1;
}
else
{
$odd = intval($length / 2);
}
$even = $length - $odd;
}
echo "\n Range [". $first .",". $last ."] : Even [". $even ."], Odd [". $odd ."] ";
}
}
}
function main()
{
$obj = new EvenOddNumber();
//Test case
$obj->count_even_odd(2, 8);
$obj->count_even_odd(1, 10);
$obj->count_even_odd(21, 33);
$obj->count_even_odd(7, 29);
$obj->count_even_odd(0, 0);
}
main();
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
/*
Node Js program
Count Even and Odd numbers in a range
*/
class EvenOddNumber
{
//Count the number of Even and Odd elements in given range
count_even_odd(first, last)
{
if (first > last)
{
//Transform into a valid range
this.count_even_odd(last, first);
}
else
{
var even = 0;
var odd = 0;
//Count number of element
var length = (last - first) + 1;
if (first % 2 == 0)
{
if (last % 2 == 0)
{
//When both given number is even
even = (parseInt(length / 2)) + 1;
}
else
{
even = parseInt(length / 2);
}
odd = length - even;
}
else
{
if (last % 2 != 0)
{
odd = (parseInt(length / 2)) + 1;
}
else
{
odd = parseInt(length / 2);
}
even = length - odd;
}
process.stdout.write("\n Range [" + first + "," + last + "] : Even [" + even + "], Odd [" + odd + "] ");
}
}
}
function main()
{
var obj = new EvenOddNumber();
//Test case
obj.count_even_odd(2, 8);
obj.count_even_odd(1, 10);
obj.count_even_odd(21, 33);
obj.count_even_odd(7, 29);
obj.count_even_odd(0, 0);
}
main();
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
# Python 3 program
# Count Even and Odd numbers in a range
class EvenOddNumber :
# Count the number of Even and Odd elements in given range
def count_even_odd(self, first, last) :
if (first > last) :
# Transform into a valid range
self.count_even_odd(last, first)
else :
even = 0
odd = 0
# Count number of element
length = (last - first) + 1
if (first % 2 == 0) :
if (last % 2 == 0) :
# When both given number is even
even = (int(length / 2)) + 1
else :
even = int(length / 2)
odd = length - even
else :
if (last % 2 != 0) :
odd = (int(length / 2)) + 1
else :
odd = int(length / 2)
even = length - odd
print("\n Range [", first ,",", last ,"] : Even [", even ,"], Odd [", odd ,"] ", end = "")
def main() :
obj = EvenOddNumber()
# Test case
obj.count_even_odd(2, 8)
obj.count_even_odd(1, 10)
obj.count_even_odd(21, 33)
obj.count_even_odd(7, 29)
obj.count_even_odd(0, 0)
if __name__ == "__main__": main()
```

#### Output

```
Range [ 2 , 8 ] : Even [ 4 ], Odd [ 3 ]
Range [ 1 , 10 ] : Even [ 5 ], Odd [ 5 ]
Range [ 21 , 33 ] : Even [ 6 ], Odd [ 7 ]
Range [ 7 , 29 ] : Even [ 11 ], Odd [ 12 ]
Range [ 0 , 0 ] : Even [ 1 ], Odd [ 0 ]
```

```
# Ruby program
# Count Even and Odd numbers in a range
class EvenOddNumber
# Count the number of Even and Odd elements in given range
def count_even_odd(first, last)
if (first > last)
# Transform into a valid range
self.count_even_odd(last, first)
else
even = 0
odd = 0
# Count number of element
length = (last - first) + 1
if (first % 2 == 0)
if (last % 2 == 0)
# When both given number is even
even = (length / 2) + 1
else
even = length / 2
end
odd = length - even
else
if (last % 2 != 0)
odd = (length / 2) + 1
else
odd = length / 2
end
even = length - odd
end
print("\n Range [", first ,",", last ,"] : Even [", even ,"], Odd [", odd ,"] ")
end
end
end
def main()
obj = EvenOddNumber.new()
# Test case
obj.count_even_odd(2, 8)
obj.count_even_odd(1, 10)
obj.count_even_odd(21, 33)
obj.count_even_odd(7, 29)
obj.count_even_odd(0, 0)
end
main()
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
/*
Scala program
Count Even and Odd numbers in a range
*/
class EvenOddNumber
{
//Count the number of Even and Odd elements in given range
def count_even_odd(first: Int, last: Int): Unit = {
if (first > last)
{
//Transform into a valid range
count_even_odd(last, first);
}
else
{
var even: Int = 0;
var odd: Int = 0;
//Count number of element
var length: Int = (last - first) + 1;
if (first % 2 == 0)
{
if (last % 2 == 0)
{
//When both given number is even
even = ((length / 2).toInt) + 1;
}
else
{
even = (length / 2).toInt;
}
odd = length - even;
}
else
{
if (last % 2 != 0)
{
odd = ((length / 2).toInt) + 1;
}
else
{
odd = (length / 2).toInt;
}
even = length - odd;
}
print("\n Range [" + first + "," + last + "] : Even [" + even + "], Odd [" + odd + "] ");
}
}
}
object Main
{
def main(args: Array[String]): Unit = {
var obj: EvenOddNumber = new EvenOddNumber();
//Test case
obj.count_even_odd(2, 8);
obj.count_even_odd(1, 10);
obj.count_even_odd(21, 33);
obj.count_even_odd(7, 29);
obj.count_even_odd(0, 0);
}
}
```

#### Output

```
Range [2,8] : Even [4], Odd [3]
Range [1,10] : Even [5], Odd [5]
Range [21,33] : Even [6], Odd [7]
Range [7,29] : Even [11], Odd [12]
Range [0,0] : Even [1], Odd [0]
```

```
/*
Swift 4 program
Count Even and Odd numbers in a range
*/
class EvenOddNumber
{
//Count the number of Even and Odd elements in given range
func count_even_odd(_ first: Int, _ last: Int)
{
if (first > last)
{
//Transform into a valid range
self.count_even_odd(last, first);
}
else
{
var even: Int = 0;
var odd: Int = 0;
//Count number of element
let length: Int = (last - first) + 1;
if (first % 2 == 0)
{
if (last % 2 == 0)
{
//When both given number is even
even = (length / 2) + 1;
}
else
{
even = length / 2;
}
odd = length - even;
}
else
{
if (last % 2 != 0)
{
odd = (length / 2) + 1;
}
else
{
odd = length / 2;
}
even = length - odd;
}
print("\n Range [\(first,last)] : Even [", even ,"], Odd [", odd ,"]", terminator: "");
}
}
}
func main()
{
let obj: EvenOddNumber = EvenOddNumber();
//Test case
obj.count_even_odd(2, 8);
obj.count_even_odd(1, 10);
obj.count_even_odd(21, 33);
obj.count_even_odd(7, 29);
obj.count_even_odd(0, 0);
}
main();
```

#### Output

```
Range [(2, 8)] : Even [ 4 ], Odd [ 3 ]
Range [(1, 10)] : Even [ 5 ], Odd [ 5 ]
Range [(21, 33)] : Even [ 6 ], Odd [ 7 ]
Range [(7, 29)] : Even [ 11 ], Odd [ 12 ]
Range [(0, 0)] : Even [ 1 ], Odd [ 0 ]
```

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