In a computer program, the user should be asked to enter a number between 1 and 20. The number can be 1 or 20 but can't be lesser than 1 or greater than 20. How should I construct the sentence?

**1- )**

*Enter a number between 1 and 20 inclusive.*

or

**2- )**

*Enter a number between 0 and 21.*

or

**3- )**

*Enter a number between 1*

*inclusive*

*and 20 inclusive.*

Many thanks