Page 487 - ComputerScience_Class_11

F. Case study-based questions.
In Python, type conversion is the process of changing a value from one data type to another to ensure that operations and calculations
are carried out correctly. This process allows a value to be treated as a different data type, enabling the correct execution of
operations. For example, an integer can be converted to a float for division operations or a string can be converted to an integer for
mathematical calculations. There are two main types of type conversion in Python: Implicit Conversion and Explicit Conversion.
• Implicit Conversion: This happens automatically when Python converts a smaller data type to a larger data type to avoid data loss.
For instance, when adding an integer and a float, the integer is implicitly converted to a float before the operation.
• Explicit Conversion: This involves manually converting a data type using Python’s built-in functions, like int(), float() or str(). For
example, a string representation of a number can be converted into an integer using int().
Based on the given case, answer the following questions:
1. Why is type conversion important in Python, especially when performing operations between different data types?
Ans. Type conversion is important in Python because it ensures that operations and calculations work correctly when performing
operations between different data types. Without proper type conversion, performing operations on mismatched data types,
such as adding an integer to a string, would result in errors or unexpected behavior. Type conversion allows Python to handle
these operations effectively and return the correct results.
2. Given the code:
a = 7
b = 3.5
result = a + b
What type of conversion occurs when a and b are added?
Ans. When a (an integer) and b (a float) are added, implicit conversion occurs. Python automatically converts the integer a to a float
before performing the addition. The result will be a float (7.0 + 3.5 = 10.5).
3. What would be the result of the following code?
num_str = "100"
num_int = int(num_str)
print(num_int)
Ans. The result of the code will be:
100
The string "100" is converted into an integer using the int() function. The print() statement then outputs the integer 100.
4. How would you convert a floating-point number 8.56 to an integer in Python?
Ans. To convert the floating-point number 8.56 to an integer in Python, you can use the int() function. This will truncate the decimal
part and return only the integer portion of the number.

G. Identify the errors in the given codes and rewrite the correct code:
1. x = 10
y = "5"
result = x + y
print("Sum:", result)
Ans. x = 10
y = "5"
result = x + int(y)
print("Sum:", result)
2. a = 100
b = 0
result = a / b
print("Division Result:", result)
Ans. a = 100
b = 20
result = a / b
print("Division Result:", result)
3. a = 10
b = 3
d = a // b
result = c + d
print("Result:", result)

Operators and Expressions 485