As with string literals, you can also use the
#!/usr/bin/perl use strict; use warnings; print 2E-4, ' ', 9.77E-5, " ", 100.00, " ", 10_181_973, ' ', 9.87E9, " ", 86.7E14, "\n";which produces the output:
0.0002 9.77e-05 100 10181973 9870000000 8.67e+15
First of all, we have done something new here with
In this case, we gave a list of arguments that included both string and numeric literals. That is completely acceptable, since Perl can usually tell the difference! The string literals are simply spaces, which we are using to separate our numeric literals on the output. Finally, we put the newline at the end of the output.
Take a close look at the numeric literals that were output. Notice that
Perl has made some formatting changes. For example, as we know, the
_'s are removed from
10_181_973. Also, those decimals and
large integers in exponential notation that were relatively reasonable
to expand were expanded by Perl. In addition, Perl only printed
100.00, since the decimal portion was zero. Of
course, if you do not like the way that Perl formats numbers by default,
we will later learn a way to have Perl format them differently
(see Output of Scalar Data).