Question 13 [True or False] - Sample Paper 1 by Teachoo - Teachoo Sample Paper

State whether the following statement is True or False: 

Indentation is optional in Python and does not affect the flow of control.

Answer:

Answer by student

The statement is False .

Detailed answer by teachoo

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The statement is False because indentation is mandatory in Python and does affect the flow of control.

Indentation is the use of whitespace at the beginning of a line of code to indicate the level of nesting or grouping of statements. In Python, indentation is used to define blocks of code that belong to a certain structure, such as a function, a class, a loop, a conditional statement, etc. Indentation is also used to improve the readability and clarity of the code.

Flow of control is the order in which the statements in a program are executed. In Python, the flow of control can be sequential, conditional or iterative, depending on the logic and purpose of the program. Sequential flow means that the statements are executed one after another in the order they are written. Conditional flow means that the execution of some statements depends on the evaluation of a condition or an expression. Iterative flow means that some statements are repeated multiple times until a condition is met or a sequence is exhausted.

Indentation affects the flow of control in Python because it determines which statements belong to which block of code and how they are executed. For example, consider the following code snippet:

In this code, we have used indentation to define two blocks of code: one for the if statement and one for the else statement. The indentation also shows that the last print statement is outside of these blocks and belongs to the main program. The flow of control in this code is conditional: if x is greater than 0, then the first print statement is executed; otherwise, the second print statement is executed. After that, the last print statement is executed regardless of the condition.

However, if we change the indentation of the code, we will get a different output or an error. For example, consider the following code snippet:

In this code, we have removed the indentation from the print statements inside the if and else blocks. This will cause a syntax error because Python expects an indented block after a colon (:). The error message will be something like this:

IndentationError: expected an indented block

This shows that indentation is not optional in Python and it does affect the flow of control.

So, the correct answer is False . 

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