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Python supports the usual logical conditions from mathematics: Equals: a == b. Not Equals: a != b. Less than: a < b. Less than or equal to: a <= b. Greater than: a > b. Greater than or equal to: a >= b. These conditions can be used in several ways, most commonly in "if statements" and loops.
- Python Conditions
Python supports the usual logical conditions from...
- Python Conditions
- Introduction
- Indentation and Blocks
- If-else
- Elif
In the example below we show the use ifstatement, a control structure. An if statement evaluates data (a condition) and makes a choice. Lets have al look at a basic if statement. In its basic form it looks like this: In this form 1. is the condition evaluated as a Boolean, it can either be True or False. 2. is one more lines of code. Each of those ...
An if statement doesn’t need to have a single statement, it can have a block. A block is more than one statement. The example below shows a code block with 3 statements (print). A block is seen by Python as a single entity, that means that if the condition is true, the whole block is executed (every statement). All programming languages can create ...
You can use if statements to make an interactive program. Copy the program below and run it. It has several if statements, that are evaluated based on the keyboard input. Because keyboard input is used, we use the equality sign (==) for string comparison. The second string is typed, but we need a number. You can convert the string to an integer usi...
If you want to evaluate several cases, you can use the elif clause. elif is short for else if. Unlike else with elif you can add an expression. That way instead of writing if over and over again, you can evaluate all cases quickly. This is a more elegant and Pythonic than to write a list of if-statements as shown below. But comes down to the same t...
Mar 3, 2022 · In Python, if statements are a starting point to implement a condition. Let’s look at the simplest example: if <condition>: <expression> When <condition> is evaluated by Python, it’ll become either True or False (Booleans).
- Python if Statement. An if statement executes a block of code only if the specified condition is met. Syntax. if condition: # body of if statement. Here, if the condition of the if statement is
- Python if... else Statement. An if statement can have an optional else clause. The else statement executes if the condition in the if statement evaluates to False.
- Python if…elif…else Statement. The if... else statement is used to execute a block of code among two alternatives. However, if we need to make a choice between more than two alternatives, we use the if...
- Python Nested if Statements. It is possible to include an if statement inside another if statement. For example, number = 5 # outer if statement if number >= 0: # inner if statement if number == 0: print('Number is 0') # inner else statement else: print('Number is positive') # outer else statement else: print('Number is negative')
In a Python program, the if statement is how you perform this sort of decision-making. It allows for conditional execution of a statement or group of statements based on the value of an expression. The outline of this tutorial is as follows: First, you’ll get a quick overview of the if statement in its simplest form.
Python’s if statement implements that kind of behaviour (Matthes, 2016). Or, to put it differently, an if statement make conditional execution of code possible (Python Docs, n.d.). If statements are very important.
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Python uses the if, elif, and else conditions to implement the decision control. Learn if, elif, and else condition using simple and quick examples.
