Chapter 5. If-else , the control flow
While working on real life of problems we have to make decisions. Decisions like which camera to buy or which cricket bat is better. At the time of writing a computer program we do the same. We make the decisions using if-else statements, we change the flow of control in the program by using them.
if expression:
do this
If the value of
expression is true (anything other than zero), do the what is written below under indentation. Please remember to give proper indentation, all the lines indented will be evaluated on the True value of the expression. One simple example is to take some number as input and check if the number is less than 100 or not.
#!/usr/bin/env python
number = int(raw_input("Enter a number: "))
if number < 100:
print "The number is less than 100"
$ ./number100.py
Enter a number: 12
The number is less than 100
