perl function oct

The oct() function in Perl is used to convert a string representing an octal number into a decimal number. It takes a single argument, which is the string to be converted.

Here's an example:

my $octal_str = '17';
my $decimal_num = oct($octal_str);

print "$octal_str in octal is $decimal_num in decimal.\n";

In this example, we declare a variable $octal_str and assign it the value '17', which represents the octal number 17. We then call the oct() function with $octal_str as the argument, and assign the result to a variable $decimal_num. Finally, we print the original string and the converted decimal number.

The output of this program would be:

17 in octal is 15 in decimal.

The oct() function can also handle more complex strings that include a prefix indicating the number base. For example:

my $octal_str = '0o17';
my $decimal_num = oct($octal_str);

print "$octal_str in octal is $decimal_num in decimal.\n";

In this example, we use the 0o prefix to indicate that the string represents an octal number. The output of this program would be the same as before:

0o17 in octal is 15 in decimal.

Similarly, the 0b prefix can be used to indicate a binary number, and the 0x prefix can be used to indicate a hexadecimal number.