Perl Numeric literals


	Perl Numeric literals
		Numeric literals can be specified in a number of different manners. 479 # simple integer 479.38 # simple real number # (floating point) .23E-10 # scientific notation 0x01df # hexadecimal 0377 # octal numbers have # a leading 0 4_294_967_296 # underscores are ignored # and can be used for # legibility All of the following declarations are equivalent: $x = 479; # decimal (base 10) $x = 0x01df; # hexadecimal (base 16) $x = 0737; # octal (base 8) Note that a leading zero is used to specify octal, so the following two declarations are not equivalent: $x = 473; $x = 0473; # 473 octal is 315 in decimal! Tip on Octal Numbers Since 9 is not a valid digit in octal (0-7), `$x = 0479` will produce an error message. What is the difference between these two lines of code? $x = 374; $x = 0374; The first one is decimal and the second is octal. Remember, literal numbers that start with a zero are interpreted in octal (base 8).