# Math and Logics

It is possible to embed complex mathematical equations and logical formulae in the document logic.

## Simple math

• Use of integers and floating point decimals are supported.
• Use of parentheses in expressions is supported. For example: `{ %=(x.price * (1 + x.tax_pct))% }`
• The following mathematical algebraic operators are supported: `+, -, *, /, %`.
operator symbol example meaning
addition `+` `a + b` sum of `a` and `b`
subtraction `-` `a - b`, `x-1` value of `a` minus `b`
multiplication `*` `a*b` value of `a` multiplied by `b`
division `/` `a/b` value of `a` divided by `b`
modulo `%` `a%b` remainder of `a` after divided by `b`

## Logics in conditions

You can use logical operators in the expressions. These are useful inside conditional expressions.

operator symbol example meaning
conjuction (and) `&` `a & b` both `a` and `b` are not null and not false values
disjunction (or) | a|b either `a` or `b` or both are not null or false
negation (not) `!` `!a` value `a` is false or null

## Function calls

There are simple functions you can call from within the template documents. Read more on the Functions documentation