在Visual Studio中编写语句时无代码输出

Question

I'm new to Python. I have visual studio and the Python 2.7 shell.

I can run 5 + 5 in the Python shell which outputs 10.

However if I do 5 + 5 in visual studio, I don't get an output. Why is this the case?

Answer 1

That is because, when you use the python shell. Shell is executing 5 + 5 when you press enter. Meaning shell executes you commands line by line, as you type them.

On the other hand Visual Studio is not a shell environment, it is an IDE (editor). Which allows you to write the whole python program and then execute it all at once.

Answer 2

In the shell the "addition" is evaluated immediately.

In the editor you have to write:

print(5 + 5)

You have to tell the program, that it should "print" something in the shell.

More Examples:

print("this will be printed")

print("this is a" + "test")

In the last example the second string is appended to the first one.

For reference or learning Python