Operators

ENG spells operators as English phrases.

Arithmetic

Example:

Let a be 20.
Let b be 5.

Print a plus b.
Print a multiplied by b.
Print a divided by b.
Print a modulo b.

Output:

25
100
4
0

plus also concatenates two strings:

Print "Hello, " plus "world.".

Adding incompatible value types produces a runtime error.

Equality

x is equal to y
x is not equal to y

Equality supports the same runtime categories where the VM can compare them, including numbers, booleans, strings, and nothing.

Numeric comparisons

x is greater than y
x is less than y
x is greater than or equal to y
x is less than or equal to y

These comparisons require numbers.

Boolean operators

condition1 and condition2
condition1 or condition2

Example:

Let age be 25.
Let has_id be true.

If age is greater than 18 and has_id, then
    Print "Allowed".
End.

Precedence

Expressions are parsed in this order, from tighter to looser binding:

1. Multiplication/division/modulo
2. Addition/subtraction
3. Comparisons
4. and
5. or

Use intermediate variables when an expression would otherwise become difficult to read.