Conditionals Statement in Python

After Python operators, we are moving to Conditionals Statement in  Python. We will discuss How many types, how to use them, etc.

Like other programming languages Python also have decision-making statements.

Python programming language provides the below mention types of Conditionals statements.

• if statement.
• if…else statements
• if…elif statement
• Nested statements
• shorthand if.. else
• Pass statements

If Statement uses for decision-making operations. It contains a body of code that runs only when the condition given is true.

Syntax:

if condition expression
:
 Statement

Example:

a = 55
b = 200
if b > a:
  print("a is less than b")

if-else Statement also uses for decision-making operations. It contains a body of code that runs only when the condition given is true, and if the conditions are false, then the code runs the else conditions.

Syntax:

if condition expression
 Statement
else 
 Statement

For Example:

a = 100
b = 40
if b > a:
  print("b is greater than a")
else:
  print("a is greater than b")

Output:

If you are familiar with the elseif statement in other programming languages, then it is easier to understand. In python, the only name is different, i.e., elif. If first, if statements are false, then code check the elif condition. If both conditions are false, then code execute the else statement.

Syntax:

if <condition>:
    <statement>
elif <condition>:
    <statement>
else:
    <statement>

Example:

a = 100
b = 40
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")

We can use Nested if conditionals Statement in Python. Nested statement be like if…elif…else statement inside another if…elif…else statement.

After one example it will be clear:

'''Here we are taking input for nested program'''

x= float(input("Enter a number: "))
if x >= 0:
    if x == 0:
        print("Zero")
    else:
        print("Positive number")
else:
    print("Negative number")

Output:

If you have only one statement for executing, one for if, and one for else, you can put it all in the one line:

I am showing an example, have a look at it:

a = 100
b = 230
print("A") if a == b else print("B")

Output:

The ‘AND and ‘OR’ are logical operators, and mostly, it is used to combine the two or more conditional statements.

Here, One Example and given below:

#'AND' keyword example:
a = 100
b = 40
c = 400
if a > b and c > a:
  print("Both the mentioned conditions are True")

#'OR' keyword example:
a = 100
b = 40
c = 200
if a > b or a > c:
  print("At least one of these conditions are True")

If statements cannot be empty, But for any reason, if the statement has any type of error, then through the pass statement, it will pass out. Python pass statement is a null statement. It does not affect the results.

a = 33
b = 100

if b > a:
  pass

Must Read:

• What are the Variables in Python?
• Data Types in Python

In the above, we have discussed the Conditionals Statement in Python, their types, how to use them with suitable examples. I hope you guys like it. In the coming one, we will discuss the loops in Python.

Thank You 🙂