If Vs Unless

You don't have to come to the meeting you want to.

You don't have to come to the meeting you don't want to.

it is raining, the demonstration will take place in the green area outside the office building.

there is anything you need, please don't hesitate to contact me.

The new programme won't work you integrate it with your existing software. It is designed to work in collaboration.

I won't contact you you specifically request that you would like me to.

you hear the fire alarm sound, please leave the office immediately as per your training.

the meeting ends earlier than expected, I won't be able to attend the presentation.

There is no need for you to do anything more you are specifically requested to by your manager.

the software prompts you to do it, there will be no need to change the settings.