Writing loops in files

Question

I'm trying to print a loop in a text file, but I always got 'invalid syntax'. This is the basic loop:
https://code.sololearn.com/c40olRaJSd2x/?ref=app

Answer 1

Defining a function in python
Syntax
Example
Calling a function- arguments

https://www.tutorialspoint.com/python/python_functions.htm

def main():
x=0
while x<100:
print(x)
x=x+1

main()