| 1. | Constant scalar | | |
| 2. | Convert to scalar | | |
| 3. | Creating a Scalar | | |
| 4. | Declare scalar variable to store the integer value | | |
| 5. | Naming Scalar Variables | | |
| 6. | Program to illustrate the use of scalar variables. | | |
| 7. | scalar value interpolation | | |
| 8. | Scalars (Denoted by $) | | |
| 9. | Simple calculation with scalar variable | | |
|
| 10. | A scalar is a variable that holds a single value, a single string, or a number. | | |
| 11. | A scalar variable can reference a string value or a numeric value. | | |
| 12. | Assign new value to the integer scalar variable | | |
| 13. | Compound assignment operator with scalar variable | | |
| 14. | Concatenate two scalar variables with double quotes | | |
| 15. | $data is a scalar variable, while @data is an array | | |
| 16. | Initializing scalars and printing their values | | |
| 17. | Perl supports integers (decimal, octal, hexadecimal), floating point numbers, scientific notation, Booleans, and null. | | |
| 18. | Merge scalar variable into the string for output | | |
| 19. | If there are no quotes, then Perl has to decide whether the value is a string or a numeric value. | | |
| 20. | Scalar variables hold a single number or string and are preceded by a dollar sign ($). | | |
| 21. | Curly Braces | | |