# Functions and methods

### Functions and methods

Python functions or methods return or do not have to return values

```
def fib(n): # write Fibonacci series up to n
    a, b = 0, 1
    while a<n:
        print(a, end=' ')
        a,b = b,a+b
    print("")

fib(10)

#0 1 1 2 3 5 8 
```