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Decision-making is the anticipation of conditions occurring during the execution of a program and specified actions taken according to the conditions.
Decision structures evaluate multiple expressions, which produce TRUE or FALSE as the outcome. You need to determine which action to take and which statements to execute if the outcome is TRUE or FALSE otherwise.
Python programming language assumes any non-zero and non-null values as TRUE, and any zero or null values as FALSE value.
Python programming language provides the following types of decision-making statements.
|Sr.No.||Statement & Description|
An if statement consists of a boolean expression followed by one or more statements.
An if statement can be followed by an optional else statement, which executes when the boolean expression is FALSE.
|3||nested if statements
You can use one if or else if statement inside another if or else if statement(s).
Let us go through each decision-making statement quickly.
If the suite of an if clause consists only of a single line, it may go on the same line as the header statement.
Here is an example of a one-line if clause −
#!/usr/bin/python3 var = 100 if ( var == 100 ) : print ("Value of expression is 100") print ("Good bye!")
When the above code is executed, it produces the following result −
Value of expression is 100 Good bye!
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