The following are numbers: 0, 1, 2, 2.5, 12.75, 0.5, 7e6 .
Enter these, and other numbers, in simple sentences with the verbs + - * and %.
2 * 12.75 25.5
An important rule is that a number does not start with a dot.
0.5 0.5 0.5 + 3 3.5 .5 +---+ �.�5� +---+ .5 + 3 �syntax error � .5+3
Clearly .5 is not the same as 0.5. You don't need to know now what .5 is, but it is important to understand that a number does not start with a dot.
The _ (underbar) is infinity and is a number.