There are many different blocks with different functionalities,so for an easier understanding and to lack boring text...
here is images of blocks and how they function!
It will send a message on the screen
The messege will be a text of your choice
Others:
Prompt:
Same as Alert but you can insert an input!
This will send a message of your liking in the console of the website
Other:
Warn and Error:
Visual differences in console
After a prompt block is used it will trigger this hat block
This reporter will return as value the last answer in a prompt block
This boolean checks if the latest answer in a prompt block is the one of your liking
This block is changing the latest answer from a prompt block to nothing
If custom reset is true then you can set custom reset to anything and it actually reset answer to that!