What is a text placeholder?

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Tags

1. #values
2. #computer
3. #space
4. #programmer
5. #characters
6. #example
7. #placeholder
8. #doesn
9. #number
10. #character
11. #certain
12. #until
13. #input
14. #needed
15. #needs
16. #string
17. #programming
18. #variables