Chap. 2: Scalar Data

1. How are numbers stored in P6?
* What different formats are there for storing numbers?
* Are there such things as 'floating-point literals' and 'integer literals'?
* How about octal and hexadecimal and other numbers?

2. What operators does P6 have to act on numbers?

3. How are strings stored in P6?
* Is there a difference between single-quoted and double-quoted string literals in P6?
* What double-quoted string backslash escapes does P6 have?

4. What operators does P6 have to act on strings?
* concatenation
* string repetition

5. How, if at all, does P6 convert between numbers and strings?

6. How are warnings enabled in P6?
* On command line?
* Inside programs?
* Are there diagnostics?

7. How do scalar variables work in P6?
* Sigil
* scalar assignment

8. What binary assignment operators does P6 have?

9. How do I produce output from a P6 program?
* print
* printf
* say

10. How do scalar variables interpolate into strings in P6?

11. How do operator precedence and associativity work in P6?

12. What comparison operators does P6 have?
* For numbers
* For strings

13. How does the 'if' control structure work in P6?
* Does it handle 'unless' control structures?

14. How are logical truth and falsehood handled in P6?
* Does P6 have a Boolean data type?

15. How do we get user input into a P6 program?
* Is there a line-input operator?
* Does P6 have operators for removing newlines or removing the last character in a string?

16. How does P6 implement a 'while' control structure?
* Does it handle 'until' control structures?

17. How does P6 handle undefined values?
* Does P6 have a 'defined' function?

18. How would we classify P6's operators with respect to the positions of the values they operate
on?

Exercises: Learning Perl, 4th ed., p. 37






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