1)Write a program to swap two numbers using a third variable.
Solution
a = int(input( ))
b = int(input())
temp = a
a = b
b = temp
print(" After swapping " , a,b)
Inputs to be entered during execution
3
2
Output
After swapping: 2 3
2) Write a program to enter two integers and perform all arithmetic operations on them.
Solution
a = int(input( ))
b = int(input( ))
print(a + b, a - b, a * b, a / b, a % b, a // b, a ** b)
Inputs to be entered during execution
3
2
Output:
5 1 6 1.5 1 1 9
3. Write a Python program to accept length and width of a rectangle and compute its perimeter and area.
Solution
length = float(input( ))
width = float(input( ))
perimeter = 2 * (length + width)
area = length * width
print(" Perimeter ", perimeter , " Area ", area)
Inputs to be entered during execution
3
2
Output:
Perimeter 10.0 Area 6.0
4. Write a Python program to calculate the amount payable if money has been lent on simple interest. Principal or money lent = P, Rate of interest = R% per annum and Time = T years. Then Simple Interest (SI) = (P x R x T)/ 100. Amount payable = Principal + SI. P, R and T are given as input to the program
Solution
P = float(input( ))
R = float(input( ))
T = float(input( ))
print(" Simple Interest ", (P * R * T) / 100 , " Amount Payable " , P + (P * R * T) / 100)
Inputs to be entered during execution
1000
10
1
Output
Simple Interest: 100.0 Amount Payable: 1100.0
5. Write a Python program to find the largest among three numbers.
Solution
a = float(input( ))
b = float(input( ))
c = float(input( ))
if a >= b and a >= c:
largest = a
elif b >= a and b >= c:
largest = b
else:
largest = c
print("The largest number is:", largest)
Inputs to be entered during execution
3
2
1
Output:
The largest number is: 3.0
6.Write a program that takes the name and age of the user as input and displays a message whether the user is eligible to apply for a driving license or not. (the eligible age is 18 years).
Solution
name = input( )
age = int(input( ) )
if age >= 18:
print(name , " Eligible to apply for a driving license. " )
else:
print(name , " Not eligible to apply for a driving license. " )
Inputs to be entered during execution
• Name = "A"
• Age = 18
Output:
A , you are eligible to apply for a driving license.
Inputs to be entered during execution
• Name = "B"
• Age = 17
Output:
B , you are not eligible to apply for a driving license.
7. Write a program that prints minimum and maximum of five numbers entered by the user.
Solution
minimum = None
maximum = None
for i in range(5):
num = float(input( ))
if minimum is None or num < minimum:
minimum = num
if maximum is None or num > maximum:
maximum = num
print(" Minimum " , minimum)
print(" Maximum " , maximum)
Inputs to be entered during execution
5
4
3
2
1
Output:
Minimum: 1.0
Maximum: 5.0
8. Write a program to find the grade of a student when grades are allocated as given in the table below. Percentage of Marks Grade Above 90% A,80% to 90% B,70% to 80% C, 60% to 70% D Below 60% E Percentage of the marks obtained by the student is input to the program.
Solution
percentage = float(input( ))
if percentage > 90:
grade = "A"
elif percentage >= 80:
grade = "B"
elif percentage >= 70:
grade = "C"
elif percentage >= 60:
grade = "D"
else:
grade = "E"
print( " Grade " , grade)
Inputs to be entered during execution
Enter the percentage of marks: 95
Output:
Grade: A
Inputs to be entered during execution
Enter the percentage of marks: 50
Output:
Grade: E
9. Write a function to print the table of a given number. The number has to be entered by the user.
Solution
def table(n):
for i in range(1, 11):
print(n, "x", i, "=", n*i)
num = int(input( ) )
table(num)
Inputs to be entered during execution
num = 3
Output:
3 x 1 = 3
3 x 2 = 6
3 x 3 = 9
3 x 4 = 12
3 x 5 = 15
3 x 6 = 18
3 x 7 = 21
3 x 8 = 24
3 x 9 = 27
3 x 10 = 30
10.Write a program to find the sum of digits of an integer number, input by the user.
Solution
num = int(input( ) )
s = 0
while num > 0:
s = s + num % 10
num = num // 10
print(s)
Inputs to be entered during execution
num = 121
Output:
3
11.Write a program to check whether an input number is a palindrome or not.
Solution
num = input( )
if num == num[::-1]:
print("Palindrome")
else:
print("Not Palindrome")
Inputs to be entered during execution
121
Output:
Palindrome
Inputs to be entered during execution
123
Output:
Not Palindrome
12.Write a program to print the following patterns:
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
Solution
for i in range(5, 0, -1):
for j in range(1, i+1):
print(j, end=" ")
print( )
Inputs to be entered during execution
5 is the input value which is mentioned in the program already.
Output:
Output pattern will be printed as given in the question.
13. Write a program that uses a user defined function that accepts name and gender (as M for Male, F for Female) and prefixes Mr/Ms on the basis of the gender.
Solution
def prefix(name, gender):
if gender == 'M':
print("Mr", name)
elif gender == 'F':
print("Ms", name)
n = input( "Enter name: ")
g = input("Enter gender (M/F): ")
prefix(n, g)
Inputs to be entered during execution
Enter name: ABC
Enter gender (M/F): M
Output
Mr ABC
Inputs to be entered during execution
Enter name: XYZ
Enter gender (M/F): F
Output
Mr XYZ
14.Write a program that has a user defined function to accept the coefficients of a quadratic equation in variables and calculates its determinant. For example : if the coefficients are stored in the variables a,b,c then calculate determinant as b2-4ac. Write the appropriate condition to check determinants on positive, zero and negative and output appropriate result.
Solution
def determinant(a, b, c):
d = b**2 - 4*a*c
if d > 0:
print("Positive determinant")
elif d == 0:
print("Zero determinant")
else:
print("Negative determinant")
a = int(input("Enter a: "))
b = int(input("Enter b: "))
c = int(input("Enter c: "))
determinant(a, b, c)
Inputs to be entered during execution
Enter a: 1
Enter b: 2
Enter c: 1
Calculation: d=b^2-4ac=2^2-4(1)(1)=4-4=0
Output
Zero determinant
Inputs to be entered during execution
Enter a: 1
Enter b: 3
Enter c: 1
Calculation: d=3^2-4(1)(1)=9-4=5
Output
Positive determinant
15.Write a program that has a user defined function to accept 2 numbers as parameters, if number 1 is less than number 2 then numbers are swapped and returned, i.e., number 2 is returned in place of number1 and number 1 is reformed in place of number 2, otherwise the same order is returned.
Solution
def swap(x, y):
if x < y:
x, y = y, x
return x, y
a = int(input("Enter first number: "))
b = int(input("Enter second number: "))
a, b = swap(a, b)
print(a, b)
Inputs to be entered during execution
Enter first number: 2
Enter second number: 5
Since 2 < 5, they are swapped.
Output
5 2
Inputs to be entered during execution
Enter first number: 5
Enter second number: 2
Since 5 > 2 , they are not swapped.
Output
5 2
🎤 Viva Voce Quick Reference Guide
🔹 Basics
Q: Why is indentation important in Python?
A: Indentation defines code blocks. Without proper indentation, Python raises errors because it cannot group statements correctly.
Q: What is the difference between = and ==?
A: = is the assignment operator (stores a value in a variable). == is the comparison operator (checks equality between two values).
Q: What is the role of input() and print()?
A: input() takes user input as a string. print() displays output to the screen.
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🔹 Control Structures
Q: What is the difference between if, if else, and if elif else?
A:
if: executes block only if condition is true.
if else: executes one block if true, another if false.
if elif else: checks multiple conditions sequentially.
Q: What is the difference between for and while loops?
A:
for: used when the number of iterations is known in advance.
while: used when iterations depend on a condition being true.
Q: What does the break statement do?
A: It immediately exits the loop, skipping all remaining iterations.
Q: What does the continue statement do?
A: It skips the current iteration and continues with the next one.
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🔹 Functions
Q: Why do we use functions in Python?
A: Functions make code reusable, organized, and easier to debug.
Q: What is the difference between a function definition and a function call?
A:
Definition: writing the function logic (def myfunc():).
Call: executing the function (myfunc()).
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🔹 Data Types & Operators
Q: Name Python’s basic data types.
A: int, float, str, bool.
Q: What is the difference between / and //?
A: / gives float division, // gives integer (floor) division.
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🔹 Common Programs
Q: How do you check if a number is a palindrome?
A: Convert to string and compare with its reverse (num == num[::-1]).
Q: How do you find the largest among three numbers?
A: Use nested if or if elif else to compare values.
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