Javascript String slice

Description

Click the following links for the tutorial for String and slice.

1. Extract only the last character:slice(-1)
2. Extract only the first character:slice(0,1)
3. Extract the characters from position 3 to 8:
4. Extract from position 3, and to the end:
5. Extract the whole string:
6. String slice() Method
7. Javascript String slice from reverse to format phone number