How can i run this

Question

if cond is not supporting, can't i use a string in if condition
https://code.sololearn.com/cg2q7pOlTEdp/?ref=app

Answer 1

In addition to Christian's answer,
ans is your Scanner object, but the user input is know. Use:
if(know.equals("yes"))

Answer 2

Read up on String.equals().

Answer 3

thank you ..
and I'll read up that