What is the diferent between "for" loop and "while" loop??

Answer 1

Not specifically for JavaScript but loops in general. A for loop is used when you know for certain how many iterations (how many times) the code in the body of loop is going to run for. Whereas a while loop is used when you don't know how many times it will run and will only stop if the stopping condition is met (when the header becomes false)

Answer 2

FOR LOOP ------>
• It is not guaranteed that how many times loop body gets executed.
WHILE LOOP ------>
• It is guaranteed that loop body will get executed at least once.

FOR LOOP ----->
• It is Entry Control loop. { in which the control checks the condition before entering into the loop }
WHILE LOOP ------>
• It is Exit Control loop. { in which the control enters into the loop without any check and after 1 execution, the control checks the condition at the time of exit }