#PYTHON(DAY13)Conditional statements

 

#PYTHON(DAY13)

Conditional statements

Python’s conditional statements carry out various calculations or operations according to whether a particular Boolean condition is evaluated as true or false.

Indentation:

Python relies on indentation (whitespace at the beginning of a line) to define scope in the code. Other programming languages often use curly-brackets for this purpose.

If statement, without indentation (will raise an error):

a = 33
b = 200
if b > a:
print("b is greater than a") 

And the output is:

File "demo_if_error.py", line 4
    print("b is greater than a")
        ^
IndentationError: expected an indented block

if statement

• ‘if’ keyword is used to validate the conditional expression(c.e) and executes the subsequent code block if the c.e turns out to be ‘True’
• syntax of ‘if’
• ‘if’ conditional_expression :
• code_block

flowchart:

IF STATEMENT

syntax:

if <conditional expression>  
 Statement  

Example:

a, b = 6, 5  
  
# Initializing the if condition  
if a > b:  
    code = "a is greater than b"  
    print(code)  

And the output is:

a is greater than b

if-else:

• if the c.e is true, then the code_block under ‘if’ will be executed
• else the c.e is false, then the code_block under ‘else’ will be executed
• ‘else’ does not have a c.e

flow chart of if-else

if-else

syntax:

if <conditional expression>  
 Statement  
else  
 Statement 

Example:

a = 200
b = 33
if b > a:
  print("b is greater than a")
else:
  print("b is not greater than a")

And the output is:

a is greater than b