In JavaScript, we use if/else statements primarily to either do something if a condition is true or do something else. This construct allows for decision-making in the code by evaluating a boolean condition and executing different blocks of code based on whether that condition is true or false.
Here's a breakdown of the options:
-
To repeat something for a fixed number of times: This is usually achieved using loops (like
for,while, etc.), not if/else statements. -
To either do something if a condition is true or do something else: This is the correct usage of if/else statements. They allow you to control the flow of your program based on specific conditions.
-
To break out of some block of code: This is typically managed with control statements like
breakorreturn, rather than if/else statements. -
To repeat something while a condition is true: Again, this is done using loops (like
whileordo...while), not if/else statements.
So, the correct answer is "To either do something if a condition is true or do something else."