The conversation between human and AI assistant.
How can I write a program to find GCD between two number in python?
Let's say 24 and 36.
Okay, here's a Python function that can find the GCD of two numbers:

```
def gcd(a, b):
    if(b == 0):
        return a
    else:
        return gcd(b, a%b)
        
a = 24
b = 36
print("The GCD of", a, "and", b, "is:", gcd(a, b))
```

You can adjust the values of `a` and `b` to whatever two numbers you want to find the GCD of.