In JavaScript, we use while loops primarily:
- To repeat some code while a condition is true.
A while loop will continue to execute a block of code as long as the specified condition evaluates to true. This makes it useful for scenarios where the number of iterations is not known beforehand and depends on some dynamic condition evaluated during the execution of the loop.
For the other options:
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To break out of some block of code: This is typically handled by using break statements, not the purpose of a while loop.
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To do something if a condition is true: This is more indicative of an if statement rather than a while loop.
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To repeat something for a fixed number of times: This is better suited for for loops, where the number of iterations is known before the loop starts.
So, the correct answer regarding the main purpose of a while loop is: To repeat some code while a condition is true.