Conditional Statements in Python

Conditional Statements in Python 

Conditional statements in Python allow for the execution of specific code blocks based on whether a given condition evaluates to True or False. This mechanism enables programs to make decisions and exhibit dynamic behavior.

The primary conditional statements in Python are:

1. if statement:

The if statement executes a block of code only if its associated condition is True. 

Python

age = 25

if (age >= 18):

    print("You are an adult.")

2. if-else statement:

The if-else statement provides an alternative block of code to execute when the if condition evaluates to False.

Python

temperature = 30

if (temperature > 25):

    print("It's hot outside.")

else:

    print("It's not too hot.")

3. if-elif-else ladder:

This structure allows for checking multiple conditions sequentially. The elif (else if) statement checks a new condition if the preceding if or elif conditions were False. The else block is executed if none of the preceding conditions are True.

Python

score = 85

if (score >= 90):

    print("Grade A")

elif (score >= 80):

    print("Grade B")

elif (score >= 70):

    print("Grade C")

else:

    print("Grade D or F")

Prog 1.  

age = 20

if (age >= 18):

    print("Eligible to vote.")

Output

Eligible to vote.

Prog 2.  

age = 10

if (age <= 12):

    print("Travel for free.")

else:

    print("Pay for ticket.")

Output

Travel for free.

Prog 3.

age = 25

if (age <= 12):

    print("Child.")

elif (age <= 19):

    print("Teenager.")

elif (age <= 35):

    print("Young adult.")

else:

    print("Adult.")

Output

Young adult.

Prog 4.

Largest of Three Numbers 

a = int(input("Enter First Number: "))

b = int(input("Enter Second Number: "))

c = int(input("Enter Third Number: "))

if (a >= b) and (a >= c):

    print("First number is largest:", a)

elif (b >= c):

    print("Second number is largest:", b)

else:

    print("Third number is largest:", c)

Prog 5.

 Check if Number is Multiple of 7 

n = int(input("Enter Number: "))

if n % 7 == 0:

    print("Multiple of 7")

else:

    print("Not a multiple of 7")

Prog 6.

Check Fail and Pass Condition

Marks=int(input("Enter the marks"))

if(marks>=33):

    print("Pass")

else:

    print("Fail")

Prog 7.

Check Percent Marks Condition

marks=int(input("Enter the Marks")

if(marks>=65):

    print("First")

elif(marks>=45):

    print("Second")

elif(marks>=33):

    print("third")

else:

    print(Fail")

Prog 8.

Check Grade Condition

marks=int(input("Enter The marks:"))

if(marks>=85):

    print("S Grade")

elif(marks>=75):

    print("A+ Grade")

elif(marks>=65):

    print("A Grade")

if(marks>=45):

    print("B Grade")

if(marks>=33):

    print("C Grade")

else:

    print("Fail")