Statements: It is a command or instruction that the python interpreter can understand and execute.
If we type a statement on the command line, Python executes it.
We may also write a sequence/group of statements in a script/program.
Types of Statement: There are 3 types of statements:
1) Empty Statement
2) Simple Statements
3) Compound Statements / Block
Empty Statement: It is the simplest statement in python. It does nothing.
Empty statement in python is pass which is written as:
pass
It acts as a dummy statement.
Whenever python encounters a pass statement, python does nothing and control moves to the next line.
It is written where the python syntax needs a statement but we don’t want to do anything. Example:
while True:
response=input("Have you learnt Python? ")
if response.upper()!="YES":
pass
else:
print("Thanks for learning from wwww.gargscademy.com")
break
Output:
Have you learnt Python? no Have you learnt Python? No Have you learnt Python? NO Have you learnt Python? yes Thanks for learning from wwww.gargscademy.com
Simple Statements: These are the simple single line statements that are executed as an individual statement in python.
Example:
1) Assignment Statements like
b=30
2) Input Statements like
num=int(input(“enter a number”))
3) Printing Statements like
print(“Welcome to Gargs Academy”)
4) Processing statements like
sum= a + b
etc.
Block / Compound Statement It is a group of statements (piece of python program text) executed as a unit.
The following are blocks:
1) a module
2) a function body
3) a class definition
4) each command typed interactively is a block.
5) if block
6) else block
7) for block
8) while block
Compound statements are written as
compound statement header:
indented body consisting of statements
may be a single statement or a group of statements.
1) First line of compound statement is header which contains a colon (:) at the end.
2) Contained Statements are not written in the same column as the control statement, rather they are indented to the right side and together they are called a block.
Indentation It refers to the (spaces and tabs) that are used at the beginning of a statement.
It is used to create groups/blocks/compound statements in python.
The statements with the same indentation belong to the same group/block.
For Example
a=int(input("enter any number"))
print("You have entered" , a)
if a==9467863365 :
print("Contact for Math & Computers at", a) #indentation
print("Gargs Academy") #indentation
print("Sonipat") #indentation
else :
print("You have got wrong number") #indentation
print("Visit site www.gargsacademy.com to get contact no") #indentation
Output 1:
enter any number9467863365 You have entered 9467863365 Contact for Math & Computers at 9467863365 Gargs Academy Sonipat
Output 2:
enter any number653542 You have entered 653542 You have got wrong number Visit site www.gargsacademy.com to get contact no