/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
for(int i=0;i<10;i++){
int y;
y=i*2;
System.
out.
println("("+i
+","+y
+")"); }
}
}
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(0,0)
(1,2)
(2,4)
(3,6)
(4,8)
(5,10)
(6,12)
(7,14)
(8,16)
(9,18)