# index

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&lt;n:

    print\(a, end=' '\)

    a,b = b,a+b

    print\(""\)
```

fib(10)

0

1

1

2

3

5

8

Common functions:
