Concept explainers
A __________ structure executes a set of statements only under certain circumstances.
- a. sequence
- b. circumstantial
- c. decision
- d. Boolean
The structure which executes statements under certain conditions is called as a decision structure.
Hence, the correct answer is option “C”.
Explanation of Solution
Decision structure:
- Decision structure executes a set of statements under certain conditions.
- It is also known as selection structure.
- The action is performed only when the condition exists and takes different action depending upon the state “True” or “False”.
Example for decision structure:
“if” statement:
“if” statement is used to make a decision structure, which permits the program to hold more than one path of execution.
- The indented statement is executed only when the condition is “true”.
- If the given condition is “false”, it skips the indented statements.
Syntax for “if” statement:
if condition:
indented_statement_block
Explanation for incorrect options:
Sequence:
Simplest form of control structure is the sequence structure. It is a group of statements that are executed in the order in which they appear.
Hence, the option “A” is wrong.
Circumstantial:
Circumstantial structure does not execute the statements under certain conditions.
Hence, the option “B” is wrong.
Boolean:
The Boolean expression evaluates the statement as either “True” or “False” with the help of “if” statement.
Hence, the option “D” is wrong.
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