How can I add user input method for marks in this code?

Question

class GradesCalculator {
public static void main (String [] args) {
int marks = 95 ;
if ( marks <= 69) {
if ( marks <=49 ) {
System.out.println (" Fail") ;

}
else {
System.out.println (" Grade B") ;
}

}
if (marks >= 70) {
System.out.println ("Grade A") ;

}

}
}

Answer 1

Just add Scanner like shown in the course
https://code.sololearn.com/cyuii86e8Pn5/?ref=app

Answer 2

use Scanner object for input