F Semester Java

Question 1

How do we accept user input?

Answer 1

we go to the top and we write

import java.util.Scanner;

then we go back and write Scanner

scanner = new Scanner (System.in);

System.out.println (“Please enter your …”);

and then we store it with

String name = scanner.nextLine();

Question 2

Condition for stopping while loop

Answer 2

Between ()
Example:
While (kleinerZahl!= 0) {………..
……}

Question 3

Checken ob 6 eine Primzahl ist

i = 1 → 6 % 1 == 0 → sum = 1

i = 2 → 6 % 2 == 0 → sum = 1 + 2 = 3

i = 3 → 6 % 3 == 0 → sum = 3 + 3 = 6

i = 4 → 6 % 4 != 0 → skip

i = 5 → 6 % 5 != 0 → skip

Answer 3

int sum = 0;
for (int i = 1; i < 6; i++) {
if (6 % i == 0) {
sum += i;
}
}

Question 4

Calculate how much time the program takes to run?

Answer 4

long begin = System.currentTimeMillis();

CODE

long end = System.currentTimeMillis();

long time= (end-begin)/1000;

System.out.println(“Elapsed Time : “ + time + “ milliseconds.”);