Number
Number can either be an integer (whole number) or a decimal number (floating point).
It can be defined using digits 0-9, . (decimals separator) and _ for readability.
All examples below are valid:
100;
1_000_000;
1.54;
Internally, numbers are represented using double-precision floating-points.
Operators
Unary operators
| Operator | Description | Example |
|---|---|---|
| - | Negation | -a |
Arithmetic operators
All arithmetic operators follow the natural mathematical precedence.
E.g. (a + b) * c is not the same as a + b * c.
| Operator | Description | Example |
|---|---|---|
| + | Addition | a + b |
| - | Subtraction | a - b |
| * | Multiplication | a * b |
| / | Division | a / b |
| ^ | Exponentiation | a ^ b |
| % | Modulus | a % b |
Comparison operators
| Operator | Description | Example |
|---|---|---|
| == | Equality | a == b |
| != | Inequality | a != b |
| < | Less than | a < b |
| > | Greater than | a > b |
| <= | Less than or equal | a <= b |
| >= | Greater than or equal | a >= b |
Functions
abs
Accepts a number, and returns the absolute value.
Syntax
abs(-1.23); // 1.23
abs(10); // 10
rand
Accepts a positive number (limit), and returns a generated number between 1 and provided limit.
Syntax
rand(100); // random whole number between 1 and 100, both included
rand(2); // random number, 1 or 2
floor
Accepts a number and rounds it down. It returns the largest integer less than or equal to given number.
Syntax
floor(5.1); // 5
floor(5.9); // 5
round
Accepts a number and rounds the number to the nearest integer.
Syntax
round(5.1); // 5
round(5.9); // 6
ceil
Accepts a number and rounds it up. It returns the smallest integer greater than or equal to given number.
Syntax
ceil(5.1); // 6
ceil(5.9); // 6
number
Accepts one argument, tries to convert number or string to number, throws an error on failure
number('20'); // 20
number(20); // 20
Note: In decision tables it is suggested to combine number with isNumeric so that expression can be protected from failing resulting in row being skipped.
For example isNumeric($) && number($).
isNumeric
Accepts one argument, returns bool, true if variable is number or string that can be converted to a number
isNumeric('20'); // true
isNumeric('test'); // false