tencent cloud

Operators

Operators are used for arithmetic or logical operations.

Arithmetic operators

• 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

• a == b: returns true if a and b both have the same type and the same value, or false otherwise.
• a != b: is the opposite of a == b.
• 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

• 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)]

Expanded Expression

An expanded expression is a concise expression similar to a for expression. For example:

[for o in var.list : o.id]
is equivalent to
var.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")