SAMS Teach Yourself Perl in 24 Hours THIRD EDITION

Literals

Perl has two different types of scalar constants called literals: numeric literals and string literals.

Numbers

Numeric literals are numbers, and Perl accepts several different ways of writing numbers. All the examples shown in Table 2.1 are valid numeric literals in Perl.

Table 2.1. Samples of Numeric Literals

Number	Type of Literal
6	An integer
12.5	A floating point number
15.	Another floating point number
.7320508	Yet another floating-point number
1e10	Scientific notation
6.67E - 33	Scientific notation (e or E is acceptable)
4_294_296	A large number with underscores instead of commas

Numbers are expressed as you think they would be. Integers are just groups of consecutive digits. Floating-point decimal numbers contain a decimal point in the correct ...