What will be the time complexity when functions like reverse is used?

Question

Analysis of time complexity needs to be clear

Answer 1

alagammai uma the time complexity of reverse method would be O(n) only. You cannot reverse it faster than that since you need to iterate over each character atleast once.

Answer 2

depend on how its implemented.
lets just say reverse is only itterate and taking its value from the back
for (int i = n-1; i>= 0 ; i--)

the complexity should be O(n)

Answer 3

I asked like if I use
StringBuffer a="hi hello";
System. out.print(a.reverse());

Answer 4

Then what would be the time complexity?

Answer 5

Ok then what about other default functions like reverse?