Conditional Statements In Python смотреть онлайн

In This Video I Explained About Conditional Statements In Python :

Conditional Statements
Block of Code
A sequence of instructions are called block of code.
Python executes code in a sequence.

Condition :
An expression that results in either True or False

Examples

i. 2 is lesser than 3
ii. a == b
iii. True

Conditional Statement :

Conditional Statement allows you to execute a block of code only when a specific condition is True .

Conditional Block :

Block of code which executes only if a condition is True is called Conditional Block.

Indentation :

1. Space(s) in front of the conditional block is called indentation.
2. Indentation(spacing) is used to identify Conditional Block.
3. Standard practice is to use four spaces for indentation.

Possible Mistakes :

Each statement inside a conditional block should have the same indentation (spacing).

Wrong Code :

if True:
print("If Block")
print("Inside If")

Output :

IndentationError: unexpected

Correct Code :

if True:
print("If Block")
print("Inside If")

If - Else Syntax :

When If - Else conditional statement is used, Else block of code executes if the condition is False.

Using If-Else :

Code :
a = int(input())
if a is greater than 0:
print("Positive")
else:
print("Not Positive")
print("End")

Input :
2

Output :
Positive
End

Possible Mistakes in If-Else :

Else can only be used along with if condition. It is written below if conditional block

Code :
if False:
print("If Block")
print("After If")
else:
print("Else Block")
print("After Else")

Output :

SyntaxError: invalid syntax

SingleLineWarning :
Warning : No code is allowed in between if conditional block and else statement.

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