String myString $=$ "Hello world";

for $($int i $=0$; i$$ myString. length$()$; i$++)\{$

System.out.print$($myString$.$charAt$($i$))$;

$\}$

What does the variable i represent?

i represents the length of mystring $.$

i represents a copy of mystring $.$

i represents the data type of mystring $.$

i represents each index or character of mystring.