What happens when an if condition evaluates to true?

When an if condition evaluates to true, the command or set of instructions contained within that if statement will execute once. This is fundamental to conditional programming, where the if statement serves to check a particular condition; if that condition is satisfied (true), then the code block that follows is executed exactly one time.

The nature of an if statement is to serve as a control structure that allows for the execution of code based on a specified condition. Once the condition is true and the corresponding code block runs, program control continues with the subsequent lines of code that follow, unless redirected by other control structures.

The other options relate to conditions that are not part of the fundamental behavior of a typical if statement. For instance, execution indefinitely or multiple times typically relates to loops like while or for loops, which operate under different conditions. On the other hand, stating that the command will never execute aligns with scenarios where the if condition evaluates to false. This control structure's basic logic ensures that if the condition is true, the code within executes only once.