# 4.1.2. Operators¶

## 4.1.2.1. Associativity¶

• Right-to-left means the value on the right is evaluated first

• Left-to-right means the value on the left is evaluated first

## 4.1.2.2. Order of Precedence¶

The order of precedence for operators:

• Bracket

• Arithmetic

• Relational

• Logical

• Assignment

Operator

Meaning

(

Left bracket

)

Right bracket

### 4.1.2.2.2. Arithmetic Operators¶

All operators here are binary (require two numbers):

Only + and - are both binary and unary operators.

Precedence

Operator

Meaning

Associativity

1

**

Exponentiation

Right-to-left

=2

*

Muliplication

Left-to-right

=2

/

Division

Left-to-right

=3

+

Left-to-right

=3

-

Subtraction

Left-to-right

### 4.1.2.2.3. Relational Operators¶

All are binary. As well as numbers, you can also compare strings, e.g. "string_1" .ne. "string_2" or "string_1" .eq. "string_2"

Precedence

Operator 1

Operator 2

Meaning

Associativity

=1

.lt.
<

Less Than

None

=1

.le.
<=

Less Than or Equal To

None

=1

.eq.
==

Equal To

None

=1

.ne.
/=

Not Equal To

None

=1

.gt.
>

Greater Than

None

=1

.ge.
>=

Greater Than or Equal To

None

### 4.1.2.2.4. Logical Operators¶

Logical Not is unary, the rest are binary:

Precedence

Operator

Meaning

Associativity

1

.not.

Unary Logical Not

Right-to-left

2

.and.

Binary Logical And

Left-to-right

3

.or.

Binary Logical Or

Left-to-right

=4

.eqv.

Binary Logical Equivalence

Left-to-right

=4

.neqv.

Binary Logical Not Equivalence

Left-to-right

### 4.1.2.2.5. Assignment Operators¶

Assignment operator is binary:

Operator

Meaning

Associativity

=

Assignment

Right-to-left

## 4.1.2.3. Concatenation, Continuation and Comments¶

Operation

Meaning

"text_1" // "text_2"

String concatenation

A = 175.5 * Year &
+ Count / 100

Ampersand (&) is a continuation line

! Text

Exclamation Mark (!) is a comment