Python Lab Manual MSBTE (22616) Practical 4 Answers

Python Lab Manual (22616) 

Practical 4 : Write simple Python program to demonstrate use of 

conditional statements: if’ statement, ‘if … else’ 

statement, Nested ‘if’ statement.

* Practical Related Question.

1. List operators used in if conditional statement

Ans => 

1. Equals: a == b.
2. Not Equal: a != b.
3. Less than: a < b.
4. Less than or equal to: a <= b.
5. Greater than: a > b.
6. Greater than or equal to: a >= b.
7. Modulus : %

2. Differentiate between if-else and nested-if statement

Ans =>  *If Else 

             1) We use If else when we have to check only one condition .

             2) Syntax : if (Condition):

                                        #Statement to be executed

                                  else:

                                        #Statement to be executed

             Nested If Else

             1) We use If else when we have to check Multiple conditions .

             2) Syntax : if (Condition):

                                             if (Condition):

                                                      #Statement to be executed

                                             else:

                                                      #Statement to be executed

                                  else:

                                              #Statement to be executed

* Exercise :

1. Write a program to check whether a number is even or odd

Ans=> 

num = int(input("Enter a number : "))

if(num % 2)==0:

    print("Number is even")

else:

    print("Number is odd")

2. Write a program to find out absolute value of an input number

Ans=> 

num = -20

absolute_number = abs(num)

print(absolute_number)

3. Write a program to check the largest number among the three numbers

Ans=> 

num1 = int(input("Enter First Number : "))

num2 = int(input("Enter Second Number : "))

num3 = int(input("Enter Third Number : "))

if(num1 >= num2) and (num1 >= num3):

    print("Largest Number = ",num1)

elif(num2 >= num1) and (num2 >= num3):

    print("Largest Number = ",num2)

else:

    print("Largest Number = ",num3)

4. Write a program to check if the input year is a leap year of not

Ans=> 

Year = int(input("Enter any year : "))

if(Year % 4==0):

    print("Leap year....!")

else:

    print("Not Leap year....!")

5. Write a program to check if a Number is Positive, Negative or Zero

Ans=> 

num = float(input("Enter a number : "))

if num == 0 :

    print("Number is zero")

elif num > 0:

    print("Number is positive")

else:

    print("Number is negative")

6. Write a program that takes the marks of 5 subjects and displays the grade. 

Ans=> 

sub1 = int(input("Enter First Subject Marks : "))

sub2 = int(input("Enter Second Subject Marks : "))

sub3 = int(input("Enter Third Subject Marks : "))

sub4 = int(input("Enter Fourth Subject Marks : "))

sub5 = int(input("Enter Fifth Subject Marks : "))

avg=(sub1+sub2+sub3+sub4+sub5)/5

if(avg>=90):

    print("Grade A")

elif(avg>=80 and avg<90):

    print("Grade B")

elif(avg>=70 and avg<80):

    print("Grade C")

elif(avg>=60 and avg<70):

    print("Grade D")

else:

    print("Grade F")