The following example has multiple statements in the if condition. Instead of writing the conditions like above, you can do it in a much neater way: Now the condition is much more readable. So lets begin. Example 1: Python If. Here is the blueprint for creating an if-statement in Python: Notice that the code inside the if-statement needs to be indented. You can instantly see that the check is about figuring out if a number is between 0 and 10. As the first/outer condition a!=0 evaluates to true, the execution enters the if block. In the code above, there are 3 boolean variables bool1, bool2, and bool3. The 1st part is the if keyword and the 2nd part is the condition we are interested in checking. Let me give you a clue from the python.org documentation. Give the age as static input and store it in a variable. The code looks repetitive and lengthy. Following is the syntax of if-statement in Python. If it is true, then print The given number is divisible by 5. Decision making is an essential concept in any programming language and is required when you want to execute code when a specific condition is satisfied. If-else conditional statement is used in Python when a situation leads to two conditions and one of them should hold true. So no point wasting computing resources evaluating the 2nd expression if the 1st one has already been evaluated to False! Here is the blueprint for creating if-else statements in Python: if condition2: #actions1 elif condition2: #actions2 elif condition3: #actions3 else: #false-actions An if-else statement that lives inside an if-else statement is called a nested if-else statement. Its commonly called the ternary operator or the ternary conditional operator. The program control first checks the condition written withif , and if the condition is true, the if block is executed. Search for jobs related to Python if statement multiple conditions examples or hire on the world's largest freelancing marketplace with 21m+ jobs. As youve learned, your Python code is executed from top to bottom. Python Program a = 2 b = 4 if a<b: print(a, 'is less than', b) else: print(a, 'is not less than', b) Run Output 2 is less than 4 2<4 returns True, and hence the if block is executed. We can also use the not operator to create an if statement with multiple conditions. But in some cases, lengthy if-elif-else chains become rather verbose and unreadable. For reference, here are the six comparison operators of Python: If you dont understand the comparison operators, feel free to read this article about Python operators. Speaking of comparisons, Im assuming you are already familiar with the comparison operators. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Example 2: Python If Statement where Boolean Expression is False. As you might expect, if the condition evaluates to True, the statements you have inside the if clause will get executed. When you need to write multiple conditions in a single expression, use logical operators to join them and create a compound condition. Let us end the discussion on the and operator by seeing how these expressions using the and operator are evaluated in Python. These are True and False. Here is a traditional if-else statement: And here is a shorter replacement for the exact same logic: The one-liner if-else statement is not a Python-only thing. zero is considered to be false and non-zero (positive or negative) is considered true. Beginners may find it confusing, so, I decided to write a very basic article about the python conditions and loops. As you can see, the above code example reads almost like English: Lets take look at another example with numbers: This piece of code checks that the height is both over 1.3m and less than 2.0m before letting a person sit on a rollercoaster. #2) if-else statements The statement itself says if a given condition is true then execute the statements present inside the "if block" and if the condition is false then execute the "else" block. Because the age is 10, the program tells you cannot drive yet: This is a simple example of an if-else statement in Python. 3)If statement with multiple conditions In all of the preceding instances, we provide a single condition with the if-statement, but we can also provide multiple conditions. When Python sees an if-statement, it checks if the condition holds and performs an action if it does. When using a match-case structure, the above code turns into this: The idea of a match-case statement is to match the compared object with a pattern and code corresponding to that pattern. In this example, we will write a nested if block: an if block inside another if block. If the condition is False, then another piece of code is executed. The syntax is easy to understand and can be summarized as follows: Python If Statement Syntax: if condition1 : block1, this can consists of multiple lines of code. The code above is pretty self-explanatory, so let us move on and have a look at a simple example of how this and operator can be used in an if statement to check 2 conditions. As you can see in the screenshot above, all comparison expressions will evaluate to the boolean values of True or False. You can write a Python If statement inside another Python If statement. As a result the whole condition is true. Give the number as static input and store it in a variable. To master the concept of how if works in python, stick around for the longer and more informative version of the answer, where we explore. The body starts with an indentation and the first unindented line marks the end. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Lets take a look at an example: The above code checks whether the entered number is divisible by 5 or not. One of the predominant approaches to monetizing Are you looking to create the next best-seller app? If you compare this truth table with the screenshot above, you can see that the and keyword in python, performs the Logical AND operation on an expression containing Item#1 and Item#2 and evaluates this Logical Expression to either True or False. Now you have a basic-level understanding of if-else statements in Python. Python is a beginner-friendly and versatile Are you looking to become an iOS developer? Image Credit: Newor Media To turn yourself into a full-time blogger, you have to be good at monetizing your blog. If the code has fewer lines but you cant make anything of it, then you are doing it wrong. If the condition is met, block code 1 is executed. If not, it returns False. But you can compare anything else, such as strings. Get the remainder by dividing the given number by 10 and store it in another variable. If your thirst for knowledge hasnt been quenched yet, here are some more articles that might interest you! The following flowchart illustrates the if statement: For example: age = input ( 'Enter your age:' ) if int (age) >= 18 : print ( "You're eligible to vote.") Code language: Python (python) This example prompts you to input your age. It is trivial that the condition provided in the above if statement evaluates to true, therefore the statement(s) inside the if block is executed. Lets print a message to the console only if its cloudy today. The If statement is a conditional statement that is used to determine whether or not a specific expression is true. In this example, we will write three statements inside if block. Search for jobs related to Python if statement multiple conditions examples or hire on the world's largest freelancing marketplace with 21m+ jobs. Now let us take a look at a simple example to see how logical OR expression can be used to check multiple conditions in Python, Hence the line number 5 in Example#4 above becomes. Let's revisit the example from earlier on: Else, the statement(s) are not executed, and the program execution continues with the statements after if statement, if there are any. Copyright 2022 codingem.com | Powered by Astra WordPress Theme, 13 Best AI Art Generators of 2022 (Free & Paid). Do try out different combinations of if-else conditions and feel free to drop questions below if any! Example 1: if 5 > 2: # execute code block if condition is true print("5 is greater than 2") Output: 5 is greater than 2 Example 2: You can also directly give boolean value to the condition, like this: if True: # always execute print("True") if False: # never execute print("False") Output: True As you can see, now the code is much more readable and will be easier to maintain! Example#1: "if" Statement with Multiple Conditions x = 10 y = 5 z = 25 # usage of "and" operator if (x > y) and (y < z): print('both (x>y) and (y>z) are true') # usage of "or" operator if (x < y) or (y < z): print('either (x < y) or (y < z) is true') Syntax: if (condition): code1 else: code2 [on_true] if [expression] else [on_false] Note: For more information, refer to Decision Making in Python (if , if..else, Nested if, if-elif) Multiple conditions in if statement This is called nesting. Example 5: Python If with multiple statements in the block. What if you have more than 3 conditions? You can remember XOR by remembering the fact that only one of the items must be True for XOR logic to be True. At this point, Ive shown you everything you need to understand about if-else statements in Python. But sometimes we have a bunch of conditions that we need to test after each other. The multiple conditions can be used using AND or OR or BOTH in the single if statement. print('Hot') >>> elif temperature > 20 and temperature <= 30: . With if-elses the program can make decisions based on conditions. With earlier versions, you get a SyntaxError. The expression x and y first evaluates x; if x is false, its value is returned; otherwise, y is evaluated and the resulting value is returned. Otherwise, the program control goes to the else block and executes it. This is used when we want to compare a variable with another variable or we want to check if a variable is true or not. Instead, we can use the Bitwise operator for xor which is ^ the cap symbol as shown in the example below. Manage Settings In this blog, you will learn about the famous if-else statement in Python.We'll be using Jupyter Notebook to demonstrate the code.. True or False? I've already helped 2M+ visitors reach their goals! Good! If the condition is False, then some other code gets executed. Instead of writing an if-else statement like this: Lets see an example of applying this in practice. In Python, the body of the if statement is indicated by the indentation. As the value of condition evaluates to 2, which is a non-zero number, the statement(s) inside if block are executed. In this tutorial of Python Examples, we learned what an If statement is in Python, what is it used for, how to write an if statement, nested if, all with the help of some well detailed examples. and hence the print statement got executed! for eg: Now, we will see how to use multiple conditions in an if statement. The program control first checks the condition written with if and if the condition proves to be true, the if block is executed. In Python, you can add multiple different conditions in an if-else statement by adding an elif block between the if and else blocks. how to combine and/ or operators to make decisions, how to avoid common pitfalls while implementing more than 2 conditions, and, best practices to write easy to read code, (a < b) evaluates to True since 10 is less than 20, (b < c) also evaluates to True since 20 is less than 30, (c < d) also evaluates to True since 30 is less than 40. Next let us see how to use combinations of AND, OR conditions in Python. Of course, if you are a beginner programmer, its way too early to think too much about code quality. Beginners Python Programming Interview Questions, A* Algorithm Introduction to The Algorithm (With Python Implementation). If you run this piece of code, you get the following output: Although it might be obvious to you, lets see why this happened. most one statement, there can be an arbitrary number of elif statements following an if. When you check for equality or run other types of comparisons in your code, you will get a boolean value as a result. An if-statement like the above is the most basic example of introducing conditional logic to your code. So, this was how we can use multiple conditions in an if statement. just use another or operator to separate the 2nd and 3rd expressions!
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