On 2013-10-27 04:00, Mayuresh Kathe wrote:
#!/usr/bin/perl -w
use strict;
use warnings;
my $exponent = $ARGV[0];
my $number = 2;
my $result = $number;
if ( not defined $exponent ) {
die "Usage: $0 <exponent>\n";
}
You have a die() there, so no indent needed. Alternative:
# assertions
defined $exponent
or die "Usage: $0 <exponent>\n";
else {
for ( my $count = 1 ; $count < $exponent ; $count++ ) {
$result = $result * $number;
}
print "$result\n";
}
exit(0);
----------------------------------------------------------------------
The code would then look more like:
#!/usr/bin/perl
use strict;
use warnings;
my $exponent = $ARGV[0];
my $number = 2;
my $result = $number;
# assertions
defined $exponent
or die "Usage: $0 <exponent>\n";
$result *= $number for 2 .. $exponent;
print "$result\n";
__END__
The code acts funny with exponents <= 0, or (for example) 1.5.
See also perlop, about the ** operator.
--
Ruud
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