![]() Print("The number is positive but not even.")Įrror Handling with Conditional StatementsĬonditional statements can be used to handle errors or unexpected situations in your code. ![]() # Code to execute if condition1 is True and condition2 is Falseįor example, let’s check if a number is positive and even: Nested if statements can be useful when you need to evaluate multiple conditions in sequence. You can nest multiple if statements inside each other to create more complex conditions. Mastering Python Conditional Statements Nested Conditional Statements Print("Error: The condition was not met.") It can be used in if statements, loops, or function definitions.įor example, let’s log an error message only if a condition is not met: The pass statement is a null operation that can be used as a placeholder when a statement is required syntactically but no action is needed. # Code to execute if value is not in the sequenceįor example, let’s check if a number is in a list of prime numbers: # Code to execute if value is in the sequence The in and not in operators are used to check if a value is present in a sequence, such as a list, tuple, or string. In this example, if condition1 is False, the expensive_function() is not called. This can be useful to avoid errors or unnecessary calculations: This means that if the result of the expression can be determined by evaluating the first condition, the second condition is not evaluated. Python uses short-circuit evaluation when evaluating boolean expressions. Print("The number is outside the range.") # Code to execute if the condition is Falseįor example, let’s check if a number is outside a specific range: # Code to execute if at least one of the conditions is True The or operator requires at least one of the conditions to be True to execute the code block: # Code to execute if both conditions are True The and operator requires both conditions to be True to execute the code block: Python provides boolean operators such as and, or, and not to combine multiple conditions in a single statement. Sign = "positive" if number > 0 else "negative" Value_if_true if condition else value_if_falseįor example, let’s assign a string based on the sign of a number: It allows you to write a simple if-else statement in a single line. Print("The number is positive and even.")Ī conditional expression (also known as a ternary operator) is a shorter way to write an if-else statement. # Code to execute if none of the conditions are Trueįor example, let’s categorize a number as positive, negative, or zero: It is placed between the if and else statements. The elif (short for “else if”) statement allows you to check multiple conditions in a single if statement. Let’s extend the previous example to handle negative numbers as well: The else statement follows an if statement and is used to execute a code block if the condition in the if statement is False. It tests a specific condition and executes the code block only if the condition is True.įor example, let’s check if a number is positive: The simplest form of a Python conditional statement is the if statement. Mastering Python Conditional Statements If Statement Else Statement Elif Statement Nested If Statements Conditional Expressions Boolean Operators Short Circuit Evaluation In and Not In Operators Pass Statement Mastering Python Conditional Statements Nested Conditional Statements Error Handling with Conditional Statements Conclusion Mastering Python Conditional Statements If Statement
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