Question

public void displayData(String [] names, int []scores, char [] grades){
        for (String name : names && char grade : grades)
            System.out.println(name + "\t");
            System.out.print(grade);

Above is my code. I need to put an and operator in the for loop but the code above is not correct. Please help. I will give additional details if needed.

Answer 1

Assuming all the arrays are parallel (all of the same length, with the value in the grades array at index i being the grade of the student in the names array at index i), you probably could just re-write the loop as:

for (int i = 0; i < grades.length; ++i) {
  System.out.println(names[i] + "\t" + grades[i]);
}

Also, try to avoid multiple System.out.print statements one after another, as each requires a call to the operating system which slows your application down a bit, because the entire program much stop while the operating system handles your request to print the string. Concatenate (stick together with ‘+‘) strings where possible, instead.