var sum=""
rowLoop: for row in 0...7{
colLoop: for col in 0...7{
if row == col {
print(sum)
sum = ""
continue rowLoop
}
sum += String(row*col) + " "
}
}
/*
0
0 2
0 3 6
0 4 8 12
0 5 10 15 20
0 6 12 18 24 30
0 7 14 21 28 35 42
*/