A condition-controlled loop will keep repeating until a specific condition is met while a count-controlled loop will run a specific number of times. It would be better to use a count-controlled loop when performing a task that has a pre-known amount of loops.

For example:
// Printing the alphabet
int count = 0
char letter = 'a'
while ( count < 26 )
	print letter
	a ++
	count ++
endwhile

It would be better to use a condition controlled loop when waiting for an event to happen to terminate the while or the amount of loops to run depends on another variable.

For example:
// Waiting for the user
while ( ! user clicks a button )
	print "waiting for user to click a button..."
	delay ( 100 )
endwhile