Which term describes a decision structure that checks for a condition and runs a code block if the condition is true?

Which term describes a decision structure that checks for a condition and runs a code block if the condition is true?

• A. IFrame
• B. If Statement
• C. Immutability
• D. Index

Answer: (B)

Conditional execution is about making a choice in the program flow based on a boolean test. The if statement embodies this: it evaluates a condition, and if that condition is true, it runs the code block that follows. If the condition is false, that block is skipped (often there’s an else branch to handle the other case). This pattern is how programs decide what to do next depending on runtime values, enabling dynamic behavior like showing a message only when a user is logged in or updating a counter when a condition holds. The other terms don’t describe this behavior. An IFrame is just an HTML element for embedding another document. Immutability refers to values that can’t be changed after creation. An index is a position or lookup key in a collection. None of these capture the idea of executing code only when a condition holds.

Conditional execution is about making a choice in the program flow based on a boolean test. The if statement embodies this: it evaluates a condition, and if that condition is true, it runs the code block that follows. If the condition is false, that block is skipped (often there’s an else branch to handle the other case). This pattern is how programs decide what to do next depending on runtime values, enabling dynamic behavior like showing a message only when a user is logged in or updating a counter when a condition holds.

The other terms don’t describe this behavior. An IFrame is just an HTML element for embedding another document. Immutability refers to values that can’t be changed after creation. An index is a position or lookup key in a collection. None of these capture the idea of executing code only when a condition holds.