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CBSE Class 11 Informatics Practices Question 27 of 36

Conditional and Looping Constructs — Question 27

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27
Question

Question 11

WAP to perform all the mathematical operations of a calculator.

Solution
print("Select operation:")
print("1. Add")
print("2. Subtract")
print("3. Multiply")
print("4. Divide")

choice = input("Enter choice (1/2/3/4): ")

num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

if choice == '1':
    result = num1 + num2
    print(num1, "+", num2, "=", result)
elif choice == '2':
    result = num1 - num2
    print(num1, "-", num2, "=", result)
elif choice == '3':
    result = num1 * num2
    print(num1, "*", num2, "=", result)
elif choice == '4':
    if num2 != 0:
        result = num1 / num2
        print(num1, "/", num2, "=", result)
    else:
        print("Division by zero is not allowed.")
else:
    print("Invalid input")
Output
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 1
Enter first number: 23
Enter second number: 45
23.0 + 45.0 = 68.0
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 2
Enter first number: 48
Enter second number: 23
48.0 - 23.0 = 25.0
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 3
Enter first number: 3
Enter second number: 6
3.0 * 6.0 = 18.0
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 4
Enter first number: 245
Enter second number: 5
245.0 / 5.0 = 49.0
Answer

print
(
"Select operation:"
)
print
(
"1. Add"
)
print
(
"2. Subtract"
)
print
(
"3. Multiply"
)
print
(
"4. Divide"
)
choice
=
input
(
"Enter choice (1/2/3/4): "
)
num1
=
float
(
input
(
"Enter first number: "
))
num2
=
float
(
input
(
"Enter second number: "
))
if
choice
==
'1'
:
result
=
num1
+
num2
print
(
num1
,
"+"
,
num2
,
"="
,
result
)
elif
choice
==
'2'
:
result
=
num1
-
num2
print
(
num1
,
"-"
,
num2
,
"="
,
result
)
elif
choice
==
'3'
:
result
=
num1
*
num2
print
(
num1
,
"*"
,
num2
,
"="
,
result
)
elif
choice
==
'4'
:
if
num2
!=
0
:
result
=
num1
/
num2
print
(
num1
,
"/"
,
num2
,
"="
,
result
)
else
:
print
(
"Division by zero is not allowed."
)
else
:
print
(
"Invalid input"
)
Output
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 1
Enter first number: 23
Enter second number: 45
23.0 + 45.0 = 68.0
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 2
Enter first number: 48
Enter second number: 23
48.0 - 23.0 = 25.0
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 3
Enter first number: 3
Enter second number: 6
3.0 * 6.0 = 18.0
Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 4
Enter first number: 245
Enter second number: 5
245.0 / 5.0 = 49.0