*Produce a program that reports whether or not an input integer is odd or even.*

`<?`

` // generate a random number`

` $number = mt_rand(1, 100);`

` `

` // divide the number by two and see if anything is left`

` // if so, it must be an odd number, because even numbers can always be divided by two perfectly`

` if ($number % 2)`

` // show that the number is odd`

` echo $number . ' is odd.';`

` else`

` // show that the number is even`

` echo $number . ' is even.'; `

`?>`

Which produces:

94 is even.

Here's a c++ solution:

`#include <iostream.h>`

`int main ()`

`{`

` int i;`

` cout << "Type a number or 0 to exit\n>";`

` cin >> i;`

` if (i%2)`

` cout << "That number is odd.\n";`

` else`

` cout << "That number is even.\n";`

` return 0;`

`}`

- March 28, 2005 - Added solution 2.
- Jan 30, 2005 - Added solution 1.

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