for (i = 1; i <= 10; i++)...            ten times
for (i = 0; i < 10; i++)...             ten times
for (i = 10; i > 0; i--)...             ten times
for (i = -10; i <= 10; i++)...          twenty-one times
for (i = 10; i >= 0; i++ )...           forever (endless loop)
for (i = -10; i <= 10; i = i + 2)...    eleven times
for (i = -10; i <= 10; i = i + 3)...    seven times