Answer:
b. to execute certain code.
Step-by-step explanation:
The purpose of an else statement is to execute certain code if the condition in an if statement is not met. It is used to specify an alternative course of action to take if the condition in the if statement is not true.
For example:
if x > 0:
print("x is positive")
else:
print("x is not positive")
In this example, the else statement is used to print a message if the condition x > 0 is not met. If x is not greater than 0, the code in the else block will be executed and the message "x is not positive" will be printed.
Note that the else statement is optional, and it can be used in conjunction with an if statement to specify alternative actions to take depending on the result of the condition.