If the condition for if is False, it checks the condition of the next elif block and so on. Code Line 11: The line print st will output the value of variable st which is "x is greater than y", Code Line 5: We define two variables x, y = 8, 8, Code Line 7: The if Statement checks for condition xy variable st is set to, Code Line 4: Prints the value of st and gives the correct output. Writing the conditional statements is an integral part of the coding process. This is called nesting in computer programming. Then a for statement constructs the loop as long as the variab⦠It is the most reliable, cross-platform way of stopping code execution. When you run the program, the output will be: In the above example, num > 0 is the test expression. In real life, I mean. If the test expression is False, the statement(s) is not executed. This is generally the case when there is decision making involved - you will want to execute a certain line of codes if a condition is satisfied, and a different set of code incase it is not. The basic structure of an âifâ statement in python is typing the word âifâ (lower case) followed by the condition with a colon at the end of the âifâ statement and then a print statement regarding printing our desired output. if.. elif.. else statements. An else statement contains a block of code that executes if the conditional expression in the if statement resolves to 0 or a FALSE value.. Python if Statement is used for decision-making operations. When the variable num is equal to 3, test expression is true and statements inside the body of if are executed. Check multiple conditions in if statement â Python Last Updated: 26-03-2020 If-else conditional statement is used in Python when a situation leads ⦠For example, you want to print a message on the screen only when a condition is true then you can use if statement to accomplish this in programming. If num is negative, Negative number is printed. Above codes are Python 3 examples, If you want to run in Python 2 please consider following code. Ltd. All rights reserved. If all the conditions are False, the body of else is executed. Hence, we get an error. But unlike while loop which depends on condition true or false. The loop then ends and the program continues with whatever code is left in the program after the while loop. The if..else statement evaluates test expression and will execute the body of if only when the test condition is True. Python if Statement Syntax if test expression: statement (s) Here, the program evaluates the test expression and will execute statement (s) only if the test expression is True. How to use "For Loop" In Python, "for loops" are called iterators. The conditional if..elif..else statement is used in the Python programming language for decision making. © Parewa Labs Pvt. Here both the variables are same (8,8) and the program output is "x is greater than y", which is WRONG. We can have a if...elif...else statement inside another if...elif...else statement. Third condition in Python leap year program will check whether year mod 4 is equal to 0. The entered code in the statement will only get executed if the condition is true. Some programs may have a code block under an âifâ clause. Once you provide the correct answer, the program would end with the following output. You can use multiple elif conditions to check for 4, We can use minimal code to execute conditional statements by declaring all condition in single statement to run the code. Python language doesn’t have a switch statement. Conditional Statement in Python perform different computations or actions depending on whether a specific Boolean constraint evaluates to true or false. Letâs take a look at the syntax, because it has pretty strict rules.The basics are simple:You have: 1. an if keyword, then 2. a condition, then 3. a statement, then 4. an else keyword, then 5. another statement.However, there are two things to watch out for:1. The print() statement falls outside of the if block (unindented). Python uses dictionary mapping to implement Switch Case in Python. What happen when "if condition" does not meet, How to execute conditional statement with minimal code, Python vs RUBY vs PHP vs TCL vs PERL vs JAVA, Code Line 5: We define two variables x, y = 2, 8, Code Line 7: The if Statement in Python checks for condition x