Python IF ELSE | Python IF ELIF ELSE | Python IF Statements | Python tutorials | Analytics fun
Python if else | Python if elif else | If statement in Python | Python tutorials for beginners
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Analytics Fun brings a video on Python If else statement to help you understand how you can use a conditional Python if else statement for decision making with concepts like shorthand if and else, nested if else etc.
The Python if else statement is one of the most basic forms of logic that can be introduced into your program. The idea of the Python if else statement is to assess whether something is the case, and, if it is, then to perform the following block of code within the statement.
Decision making statements in programming languages decides the direction of flow of program execution. Decision making statements available in python are:
Python if statements
Python if else statement
1 - Python if statements
Python if statements is the most simple decision making statement. It is used to decide whether a certain statement or block of statements will be executed or not i.e if a certain condition is true then a block of statement is executed otherwise not.
Python if statements syntax:
Statements to execute if condition is true
Here, condition after evaluation will be either true or false. Python if statements accepts boolean values – if the value is true then it will execute the block of statements below it otherwise not. We can use condition with bracket ‘(‘ ‘)’ also.
As we know, python uses indentation to identify a block. So the block under an Python if statements will be identified as shown in the below example:
2 - Python if else statement
The Python if statements alone tells us that if a condition is true it will execute a block of statements and if the condition is false it won’t. But what if we want to do something else if the condition is false. Here comes the Python if else statement. We can use the else statement with if statement to execute a block of code when the condition is false.
An else statement can be combined with an if statement. An else statement contains the block of code that executes if the conditional expression in the if statement resolves to 0 or a FALSE value.
The else statement is an optional statement and there could be at most only one else statement following if.
Python if else statement syntax:
if (condition):
Executes this block if condition is true
else :
Executes this block if condition is false
3 - Python if elif else statement
Here, a user can decide among multiple options. The if statements are executed from the top down. As soon as one of the conditions controlling the if is true, the statement associated with that if is executed, and the rest of the ladder is bypassed. If none of the conditions is true, then the final else statement will be executed.
The elif statement allows you to check multiple expressions for TRUE and execute a block of code as soon as one of the conditions evaluates to TRUE.
Similar to the else, the elif statement is optional. However, unlike else, for which there can be at most one statement, there can be an arbitrary number of elif statements following an if.
Python if elif else statement syntax:
if (condition):
statement
elif (condition):
statement
.
.
else:
statement
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