HomePython Page 7 - Python 101 (part 2): If Wishes Were Pythons
Tying Up The Loose Ends - Python
Begin your tour of Python with a look at its number and stringtypes, together with examples of how they can be used in simple Pythonprograms. Along the way, you'll also learn how to build conditionalexpressions, slice and dice strings, and accept user input from the commandline
In addition to the "if" statement, Python also allows you a couple of variants - the first is the "if-else" statement, which allows you to execute different blocks of code depending on whether the expression is evaluated as true or false.
The structure of an "if-else" statement looks like this:
if condition:
do this!
else:
do this!
In this case, if the conditional expression evaluates as
false, all statements within the indented "else" block will be executed. Modifying the example above, we have
#!/usr/bin/python
# ask for a number
alpha = input("Gimme a number! ")
# ask for another number
beta = input("Gimme another number! ")
# check
if alpha == beta:
print ("Can't you read, moron? I need two *different* numbers!")
else:
print ("Finally! A user with active brain cells!");
Python 
