rand7 using rand5

// Java program to Generate integer from  
// 1 to 5 with equal probability 
class GfG  
{ 
  
// given method that returns 1 to 5 with equal probability  
static int foo()  
{  
    // some code here  
    return 0; 
}  
  
// returns 1 to 7 with equal probability 
public static int my_rand()   
{  
    int i;  
    i = 5*foo() + foo() - 5;  
    if (i < 22)  
        return i%7 + 1;  
    return my_rand();  
}  
  
// Driver code 
public static void main (String[] args) {  
  
    System.out.println(my_rand());  
} 
}