#!/usr/local/bin/perl
# Jaime Prilusky, 2003

  foreach $i ( 1 .. 10) {
    $num = rand(10) - 5;
    printf ("%20.10f\n",$num);
  }

__DATA__
Perl's "sprintf" permits the following universally known conversions:
    %%   a percent sign
    %c   a character with the given number
    %s   a string
    %d   a signed integer, in decimal
    %u   an unsigned integer, in decimal
    %o   an unsigned integer, in octal
    %x   an unsigned integer, in hexadecimal
    %e   a floating-point number, in scientific notation
    %f   a floating-point number, in fixed decimal notation
    %g   a floating-point number, in %e or %f notation

In addition, Perl permits the following widely supported conversions:
    %X   like %x, but using upper-case letters
    %E   like %e, but using an upper-case "E"
    %G   like %g, but with an upper-case "E" (if applicable)
    %b   an unsigned integer, in binary
    %p   a pointer (outputs the Perl value's address in hexadecimal)
    %n   special: *stores* the number of characters output so far
         into the next variable in the parameter list