import java.io.*;
import java.util.*;
public class For {
/* A for loop factorial method */
public int factorial(int n) {
int fact = 1;
for (int i=1; i<=n; i++){
fact = fact * i;
}
return fact;
}
/*A for loop which will reverse the order of the letters in a string*/
public String reverse(String s){
String reverseWord = "";
for (int length = s.length(); length > 0; length = length - 1){
reverseWord = reverseWord + s.substring(length-1, length);
}
return reverseWord;
}
/*A for loop which will create a product table for two integers */
public String table(int a, int b) {
String productTable = "";
for (int i=1; i<=b; i++){
for (int j=1; j<=a; j++){
productTable += (i*j)+" ";
}
productTable += "\n";
}
return productTable;
}
}