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- import static javax.swing.JOptionPane.*;
- class primtall2 {
- public static void main (String[]args) {
- String tallLest = showInputDialog("Hvilket tall skal undersøkes?");
- int tall = Integer.parseInt(tallLest);
- if(tall == 2) {
- showMessageDialog(null, tall + " er et primtall");
- }
- if ( tall%2 == 0) {
- showMessageDialog(null, tall + " er ikke et primtall");
- }
- for(int i = 3; i < tall; i++) {
- if(tall % i == 0 ) {
- showMessageDialog(null, tall + " er ikke et primtall");
- }
- else{ showMessageDialog(null, tall + " er et primtall");
- }
- }
- }
- }
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