Operators
Operators are used for arithmetic or logical operations.
Arithmetic operators
Operator | Description |
a + b | Returns the result of adding a and b together. |
a - b | Returns the result of subtracting b from a. |
a * b | Returns the result of multiplying a and b. |
a / b | Returns the result of dividing a by b. |
a % b | Returns the remainder of dividing a by b. This operator is generally useful only when used with whole numbers. |
-a | Returns the result of multiplying a by -1. |
Comparison operators
Operator | Description |
a == b | Returns true if a and b both have the same type and the same value, or false otherwise. |
a != b | Contrary to ==. |
a < b | Returns true if a is less than b, or false otherwise. |
a > b | Returns true if a is greater than b, or false otherwise. |
a <= b | Returns true if a is less than or equal to b, or false otherwise. |
a >= b | Returns true if a is greater than or equal to b, or false otherwise. |
Logical operators
Operator | Description |
a || b | Returns true if either a or b is true, or false if both are false. |
a && b | Returns true if both a and b are true, or false if either one is false. |
!a | Returns true if a is false, or false if a is true. |
Conditional Expression
A conditional expression uses the value of a Boolean expression to select one of two values. For example:
condition ? one_value : two_value
for Expression
A
for expression can be used to traverse a set of collections and map one collection type to another. For example:[for item in items : upper(item)]
Splat Expression
A splat expression provides a more concise way to express a common operation that could otherwise be performed with a for expression. For example:
[for o in var.list : o.id]is equivalent tovar.list[*].id
Function Expression
Terraform supports the use of some built-in functions when expressions are calculated. An expression to call a function is similar to an operator. For example:
upper("123")
Yes
No
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