Conditions and loops

Conditions are checked using a left and right value comparison. The evaluation returns either true or false, and a specific action is performed depending on the result.

There are certain condition operators that are used to evaluate the left and right value comparisons:

An example of the condition evaluation is as follows:

As we can see, we are checking whether 2>3 (2 is greater that 3). Of course, this would result in false, so the action in the else section is executed. If we reverse the check, 3>2, then the output would have been left value is greater.

In the preceding example, we used the if condition block, which consists of the following:

if <condition>:     
perform action
else:   
perform action2

Notice the indentation, which is compulsory in Python. If we had not intended it, Python would not interpret what action to execute in which condition, and hence would have thrown an error of incorrect indentation.