Editing Community Data Science Course (Spring 2015)/Day 1 Tutorial (section)

== Part 2: Printing==

So far we've been learning at the interactive '''Python interpreter'''. When you are working at the interpreter, any work that you do gets printed to the screen. For example:

 h = "Hello"
 w = "World"
 h + w

will display "HelloWorld".

Another place that we will be writing Python code is in a file. When we run Python code from a file instead of interactively, we don't get work printed to the screen for free. We have to tell Python to print the information to the screen. The way we do this is with the '''print''' function. Here's how it works:

 h = "Hello"
 w = "World"
 print(h + w)

 my_string = "Alpha " + "Beta " + "Gamma " + "Delta"
 print(my_string)


The string manipulate is exactly the same as before. The only difference is that you need to use '''print''' to print results to the screen:

    <code>h + w</code>

becomes

    <code>print(h + w)</code>

We'll see more examples of the print function in the next section.