Question 4 - Sample Paper 1 by Teachoo - Teachoo Sample Paper

What will be the output of the following Python code?

x = 5

y = 2

z = x ** y / 2 + x % y * 2

print(z)

Options

A) 7.5

B) 7.0

C) 14.5

D) 8.0

Answer:

Answer by student

C) 14.5

Detailed answer by teachoo

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• An expression is a combination of values, variables, and operators that can be evaluated to produce a single value. 
• A statement is an instruction that can be executed by the Python interpreter to perform some action. 
• A type conversion is a process of changing the data type of a value from one type to another. For example, converting an integer to a float or a string to a boolean. There are two types of type conversion: explicit and implicit. Explicit conversion is done by using built-in functions, such as int() , float() , str() , etc. Implicit conversion is done automatically by the Python interpreter when it is necessary, such as when performing arithmetic operations on different types of values.
• Now that we know these concepts, we can proceed to find out the output of the code. We will follow these steps:
• First, we will assign the values 5 and 2 to the variables x and y respectively using the assignment statements x = 5 and y = 2 .
• Next, we will evaluate the expression x ** y / 2 + x % y * 2 and assign the result to the variable z using the statement z = x ** y / 2 + x % y * 2 .
• To evaluate this expression, we will follow the rules of precedence and associativity of operators in Python. Precedence means the order in which operators are evaluated. Associativity means the order in which operators with the same precedence are evaluated. In Python, operators have the following precedence from highest to lowest:

Operators with the same precedence are evaluated from left to right, except for exponentiation (**), which is evaluated from right to left.

• Therefore, we will evaluate the expression as follows:

Note that in this expression, there is an implicit type conversion from integer to float when performing division (/). This is because division always returns a float value in Python.

• Finally, we will display the value of z using the statement print(z) . This will print 14.5 on the screen.

Therefore, option C) is the correct answer.

So, the correct answer is C) 14.5.

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