# Greatest Common Denominator Function

## Function

`gcd(a,b)`

## Summary

Returns the greatest common denominator of the two numbers a and b.

## Examples

` gcd(6, 4) = 2 `

` gcd(8, 12) = 2 `

` gcd(12, 27) = 3 `

` gcd(10, 15) = 5 `

` gcd(12, 48) = 6 `

` gcd(15, 25) = 5 `

` gcd(100, 31) = 1 `