Python if , elif and else

Python Conditions and If statements

python_conditions_and_if_statements

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.

An "if statement" is written by using the if keyword.

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

Indentation

Python relies on indentation, using whitespace, 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") # you will get an error

Elif

The else keyword catches anything which isn't caught by the preceding conditions.

a = 200
b = 33
if b > a:
  print("b is greater than a")
elif a == b:
  print("a and b are equal")
else:
  print("a is greater than b")

You can also have an else without the elif:

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

Short Hand If

If you have only one statement to execute, you can put it on the same line as the if statement.

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

Short Hand If ... Else

If you have only one statement to execute, one for if, and one for else, you can put it all on the same line:

print("A") if a > b else print("B")

You can also have multiple else statements on the same line:

print("A") if a > b else print("=") if a == b else print("B")

And

The and keyword is a logical operator, and is used to combine conditional statements:

if a > b and c > a:
  print("Both conditions are True")

Or

The or keyword is a logical operator, and is used to combine conditional statements:

if a > b or a > c:
  print("At least one of the conditions is True")


If you like dEexams.com and would like to contribute, you can also write your article here or mail your article to admin@deexams.com . See your article appearing on the dEexams.com main page and help others to learn.


Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.


Python if , elif and else

Python Conditions and If statements

  • 0
Python for beginners

Learning Python Part 1

  • 3
Struct Alignment and Padding

Struct Alignment and Padding in C++ And C

  • 0
Friend function

Friend function C++

  • 0
Pointers

C++ Pointers

  • 0
Structures

C++ Structures

  • 0
Types of Inheritance in C++

Inheritance and access specifiers C++

  • 0
Java date pattern

Java Date Pattern Syntax

  • 0
Java Date and Calendar

Java Date formats

  • 0
JAVA Data Type

Data types in Java

  • 0
Java unreachable code

Unreachable Code Error in Java

  • 0

Post Comment

Comments(0)

WEB TECHNOLOGY

Articles

×

Forgot Password

Please enter your email address below and we will send you information to change your password.