compare 2 strings kotlin

1string1 == string2 //returns true if they are equal and false if they are not

1val hello = "Hello"
2    val world = "World"
3
4    // equals() returns true or false
5    val equals = hello.equals(world)
6
7    // compareTo() will return 0 if true
8    // Any non zero value is false
9    val compare = hello.compareTo(world)