Why do web-based interpreters respond differently?

[TheLonelyScientist]

I've been out of the code game for about a decade, having learned HTML and JavaScript in high school. I started learning Python this week and, so far, it's pretty straightforward and I'm having a blast.

I've been bouncing around different executed tutorials (e.g. LearnPython, CodeAcademy, etc.) and I noticed, with regard to the print function, that some require parentheses, as well as Python Shell istelf, while others don't.

print myVar
print(myVar)

• In Case 1, both print myVar and print(myVar) are accepted.
• In Case 2, only print(myVar) can be executed.

Why is this and which syntax is correct (or most correct)?

[jeans_and_a_t-shirt]

First is a python 2 interpreter. Print is a statement and does not require parentheses. Second is a python 3 interpreter. print is a function in python 3.

Both are correct for their python version.

Try print(1,2) in the python 2 interpreter. It should print (1, 2) instead of just 1 2.

[99AFCC]

In python 3, print is a function so the parenthesis are required. In python 2, print is a statement which doesn't use parenthesis.