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I have taken a c++ programming course and I'm trying to learn python. In C++ I would write something like:

int var = 3;
var = var+1;
cout << var << endl;

and later when I compile and run the program I expect the program to display the number 4. But in Python i wrote:

>>> var=3
>>> var=var+1
>>> print var
4

and to my dismay a 4 pops out right away! So how can write scripts so that they don't start doing things right away?

Also how do I use my Python programs once they're written?( I'm using Ubunu 12.10 and IDLE.)
For instance in for a C++ program, using the Linux terminal I would find the program in my directory, then type:

g++ ./programName.cpp

And if it compiles I would type:

./a.out

And my program would run in the terminal!

You need to write the data into a .py file. Python is an interpreter language. So for example, run the command in terminal "touch test.py", "cat test.py", then type
End the cat, then type "python test.py"

And it will run XD