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If num is negative, Negative number is printed.
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When variable num is positive, Positive number is printed. Flowchart of if.elif.else Flowchart of if.elif.else statement in Python Example of if.elif.else '''In this program, The if block can have only one else block. Only one block among the several if.elif.else blocks is executed according to the condition. If all the conditions are False, the body of else is executed. If the condition for if is False, it checks the condition of the next elif block and so on. It allows us to check for multiple expressions. Python if.elif.else Statement Syntax of if.elif.else If num is equal to 0, the test expression is true and body of if is executed and body of else is skipped. If num is equal to -5, the test expression is false and the body of else is executed and the body of if is skipped.
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In the above example, when num is equal to 3, the test expression is true and the body of if is executed and the body of else is skipped. Python if.else Flowchart Flowchart of if.else statement in Python Example of if.else # Program checks if the number is positive or negative Indentation is used to separate the blocks.
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If the condition is False, the body of else is executed. The if.else statement evaluates test expression and will execute the body of if only when the test condition is True. Python if.else Statement Syntax of if.else Hence, it is executed regardless of the test expression. The print() statement falls outside of the if block (unindented). If the variable num is equal to -1, test expression is false and statements inside the body of if are skipped. When the variable num is equal to 3, test expression is true and statements inside the body of if are executed. The body of if is executed only if this evaluates to True. In the above example, num > 0 is the test expression. When you run the program, the output will be: 3 is a positive number Python if Statement Flowchart Flowchart of if statement in Python programming Example: Python if Statement # If the number is positive, we print an appropriate message Python interprets non-zero values as True. The body starts with an indentation and the first unindented line marks the end. In Python, the body of the if statement is indicated by the indentation. If the test expression is False, the statement(s) is not executed. Here, the program evaluates the test expression and will execute statement(s) only if the test expression is True. The if…elif…else statement is used in Python for decision making.
#Multiple or statements python code#
Nested if statements are often used when you must test a combination of conditions before deciding on the proper action.Decision making is required when we want to execute a code only if a certain condition is satisfied. Nested if statementsĪ nested if statement is an if statement placed inside another if statement. if/else if statements are often used to control program flow in menu driven programs. The user then selects an option and the program proceeds with execution based on the menu selection.
#Multiple or statements python series#
In a menu driven program, the user is presented with a menu or series of options. The C++ Early Objects book contains a discussion (p. You can add a trailing else statement to the if/else if statement if you want to execute code if none of the if statements are true. You could write the above program using separate if statements such as show below but the if/else if approach is cleaner and better indicates that the program should choose either one or none of the options.Īdd a trailing else to the if/else if statement Use the “if/else if” if you need to choose either one or none of a series of options. continuation point after if/else if is complete If the end of the if/else if chain is reached without a true expression, no code blocks are executed. The if statements are evaluated in order until one of the if expressions is true or the end of the if/else if chain is reached. The if/else if statement allows you to create a chain of if statements. If you only need to execute a single statement for the else condition, you do not need to use curly brackets. If you want to execute multiple statements for the else condition, enclose the code in curly brackets. The else part of the if/else statement follows the same rules as the if part.