Conditionals Code

Conditionals Code#

Section Title: Conditionals Code

Please solve the following questions using Python code.

Question-1#

Write a program that asks the user to enter a 6-digit number.

Check whether the digit in the thousands place is even.

Solution

number = input('Please enter a 6 digit number: ')

thousands_digit = int(number[2])

if thousands_digit % 2:
    print(f'Thousands digit is odd.')
else:
    print(f'Thousands digit is even.')

Question-2#

Write a program that asks the user to enter a percent grade.

Display the corresponding “Letter Grade” according to the following grading scale.

Letter Grade	Grade Range
A	96 - 100
A-	90 - 95
B+	87 - 89
B	84 - 86
B-	80 - 83
C+	77 - 79
C	74 - 76
C-	70 - 73
D+	67 - 69
D	64 - 66
D-	60 - 63
F	0 - 59

Solution

grade = float(input('Please enter your percent grade: '))

if grade >= 96: print('A')
elif grade >= 90: print('A-')
elif grade >= 87: print('B+')
elif grade >= 84: print('B')
elif grade >= 80: print('B-')
elif grade >= 77: print('C+')
elif grade >= 74: print('C')
elif grade >= 70: print('C-')
elif grade >= 67: print('D+')
elif grade >= 64: print('D')
elif grade >= 60: print('D-')
else: print('F')

Question-3#

The piecewise-defined function \(f(n)\) is given as follows:

\[\begin{split} f(n) = \begin{cases} n^2+3n+4 & n > 7 \\ 3n-7 & 7 \ge n >4 \\ 10 & 4 \ge n \ge 2\\ 3-4n & \text{otherwise}\\ \end{cases} \end{split}\]

Write a program that asks the user to enter an integer.
If the integer entered is n then display f(n).
Hint:
- If n is greater than 7 then f(n)= \(n^2+3n+4\).
- If n is between 4 (4 is not included) and 7 (7 is included) then f(n)=3n-7.
- If n is between 2 (2 is not included) and 4 (4 is included) then f(n)=10.
- If n is less than 2 then f(n)=3-4n.

Solution

n = int( input('Enter an integer: ')  )

if n > 7:
    print(f'f({n}) = {n**2+3*n+4}')
elif 4 < n:
    print(f'f({n}) = {3*n-7}')
elif 2 <= n:
    print(f'f({n}) = 10')
else:
    print(f'f({n}) = {3-4*n}')

Question-4#

Temperature Converter: Fahrenheit (F) <—> Celsius (C).

Ask for temperature with unit (F or C) from the user.
- Use only one input function.
- The user should enter the temperature in the form (int)F or (int)C.
  - Example: 37F or 42C
If the temperature is given in Fahrenheit (F) by the user, then convert it to Celsius (C).
If the temperature is given in Celsius (C) by the user, then convert it to Fahrenheit (F).
Display the converted temperature with its unit.

Solution

temperature_unit = input('Please enter the temperature with the unit: ')

temp = int(temperature_unit[:-1])     # the slice, except for the last character, represents the numerical value of the temperature.
unit = temperature_unit[-1]           # the last character is the unit

if unit == 'F':
    print(f'It is {(temp-32)/1.8}C.')
else:
    print(f'It is {temp*1.8+32}F.')

Question-5#

Ask the user to input a non-negative integer.

Check if this integer is a perfect square and print your conclusion.
- Perfect squares are squares of integers, for example: 0, 1, 4, 9, 16, 25, 36, 49, etc.
If the given number is a negative integer, print a warning message.
Utilize the sqrt function from numpy or math.
Example:
- For number = -3, output: -3 < 0. Please enter a non-negative integer.
- For number = 4, output: 4 is a perfect square.
- For number = 12, output: 12 is NOT a perfect square.

Solution

import math
number = int(input('Enter a non-negative integer: '))

if number < 0:
  print(f'{number} < 0. Please enter a non-negative integer.')
else:
  int_sqrt = int(math.sqrt(number))           # if a number is a perfect square, its square root is an integer
  if int_sqrt**2 == number:                   # so the square root's integer part is itself
    print(f'{number} is a perfect square.')
  else:
    print(f'{number} is a NOT perfect square.')

Question-6#

Ask for a name from the user.

Check if it contains the letters ‘k’ or ‘K’ and if the length of the name is an odd number.
If this is the case, then replace ‘k’ with ‘y’ and ‘K’ with ‘Y’.
Display the new name.
Example:
- name = Tom Output: Tom
- name = Jack Output: Jack (length is even)
- name = KaThy Output: YaThy
- name = katHy Output: yatHy

Solution

name = input('Enter a name: ')

if ('k' in name.lower()) & (len(name)%2==1):
  print(name.replace('k','y').replace('K','Y'))
else:
  print(name)

Question-7#

Ask for a number from the user

Check whether the given number satisfies the following inequality: \(x^2-3x+6>192\)
Display the conclusion.

Solution-1

x = float(input('Enter a number: '))

y = x**2-3*x+6

if y > 192:
  print(f'{x} satisfies the inequality')
else:
  print(f'{x} does NOT satisfy the inequality')

Solution-2

x = float(input('Enter a number: '))

inequality = (x**2-3*x+6) > 192

if inequality:
  print(f'{x} satisfies the inequality')
else:
  print(f'{x} does NOT satisfy the inequality')

Question-8#

Ask for Test-1, Test-2, and Final exam grades from the user.

Use three input functions.
Compute the weighted average by using the following formula:
- Weighted Average = 0.2 x Test-1 + 0.3 x Test-2 + 0.5 x Test-3
Find the letter grade by using the following grading scale.

Weighted Average	Letter Grade
75-100	A
60-74	B
40-59	C
0-39	F

Example:
- Test-1 grade: 70
- Test-2 grade: 80
- Final grade: 90
- Weighted average = \(0.2 \times 70 + 0.3 \times 80 + 0.5 \times 90 = 14 + 24 + 45 = 83\)
- Output:
  - Weighted Average 83.0 —-> Letter Grade: A

Solution

test1 = float(input('Test-1 grade: '))
test2 = float(input('Test-2 grade: '))
final = float(input('Final  grade: '))

weighted_grade = test1*0.2+test2*0.3+final*0.5

print(f'Weighted Average {weighted_grade}   ---->   Letter Grade: ', end='')

if   100 >= weighted_grade >= 75: 
    print('A')
elif weighted_grade >= 60: 
    print('B')
elif weighted_grade >= 40:
    print('C')
else:
    print('F')

Question-9#

Print the statement: Basic Calculator
Print 20 dashes (-)
Ask the user for two numbers using two input functions
Ask the user for the operation to perform
- Provide the options: +, -, x, /
- The user should choose one of them.
Find the result
- Perform the operation: First Number operation Second Number.
- If the second number is zero, do not perform the division operation and display a warning message.
- If the operation is division, also round the result.
Example: num1=5, num2=7, operation=’x’ —> Output: 5x7=35

Solution

print('Basic Calculator')
print('-'*20)

number1 = float(input('Number-1: '))
number2 = float(input('Number-2: '))
operation = input('Operation: (+,-,x,/): ')

if   operation == '+': 
    print(f'{number1} {operation} {number2} = {number1 + number2}')
elif operation == '-': 
    print(f'{number1} {operation} {number2} = {number1 - number2}')
elif operation == 'x': 
    print(f'{number1} {operation} {number2} = {number1 * number2}')
else:
  if number2 == 0: 
      print('Warning: Division by zero.')
  else: 
      print(f'{number1} {operation} {number2} = {number1 / number2:.2f}')

Question-10#

Ask the user for a number with at most 8 digits.

If the given number has fewer than 8 digits, pad zeros to the left to make it an 8-digit number.
Example:
- Given number: 123 —> Output: 00000123
- Given number: 123456789 —> Output: Please enter a number with at most 8 digits.
- Given number: 12345678 —> Output: 12345678

Solution

number = input('Please enter a number with at most 8 digits: ')

length = len(number)

if length <= 8:
  print((8-length)*'0'+number)
else:
  print('Please enter a number with at most 8 digits.')

Conditionals Code

Contents

Conditionals Code#

Question-1#

Question-2#

Question-3#

Question-4#

Question-5#

Question-6#

Question-7#

Question-8#

Question-9#

Question-10#