import java.io.*;
import java.util.*;
public class For {
//Rewriting with for loop
public boolean isPrime(int n) {
for (int numBelow = n - 1; numBelow > 1; numBelow--){
if (n%numBelow == 0) {
return false;
}
}
return true;
}
public String Reverse(String s) {
int l;
String result = "";
for (l = s.length(); l > 0; l--){
result = result + s.substring(l-1,l);
}
return result;
}
//NEED EXPLANATION
public String table(int n, int m) {
int i;
int j;
String line = "";
//for (j = 0; j <= n; j++) {
// line = line + j + "\t";
for (i = 0; i <= m; i++) {
for (j = 0; j <= n; j++) {
if (i == 0 && j != 0)
line = line + j + "\t";
else if (i != 0 && j == 0)
line = line + "\n" + i + "\t";
else if (i > 0 && j > 0)
line = line + " " + i * j + "\t";
}
}
return line;
}
}