Perl multiplication operator
Take a look at the following code:
$x = 5 * 3 + 4;
Since the precedence of the multiplication operator (*) is higher than that of the addition operator ( + ),
the multiplication is evaluated first, so the result is (5 * 3) + 4, or 19.
If this is not what you meant, you can always use parenthesis, like this:
$x = 5 * (3 + 4);
Numeric Operators
Perl provides the typical ordinary addition, subtraction, multiplication, and division
operators, and so on. For example:
2 + 3 # 2 plus 3, or 5
5.1 - 2.4 # 5.1 minus 2.4, or 2.7
3 * 12 # 3 times 12 = 36
14 / 2 # 14 divided by 2, or 7
#
10.2 / 0.3 # 10.2 divided by 0.3, or 34
10 / 3 # always floating-point divide, so 3.3333333...
Perl also supports a modulus operator (%). The value of the expression 10 % 3 is the remainder when 10 is divided by 3, which is 1. Both values are first reduced to their integer values, so 10.5 % 3.2 is computed as 10 % 3.* Additionally, Perl provides the FORTRAN-like exponentiation operator, which many have yearned for in Pascal and
C. The operator is represented by the double asterisk, such as 2**3, which is two to the third power, or eight.
In addition, there are other numeric operators.