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Basic Operators |
An operator is a special symbol or phrase that you use to check, change, or combine values.
For example, the addition operator (+
) adds two numbers,
as in const i = 1 + 2
,
and the logical AND operator (&&
) combines two Boolean values, as in if isPrime && isEven
.
LichenScript supports the operators you may already know from languages like JavaScript.
The assignment operator (=
) doesn’t return a value, to prevent it from being mistakenly used when the equal to operator (==
) is intended.
The assignment operator (a
= b
) initializes or updates the value of a with the value of b
:
const b = 10
let a = 5
a = b
// a is now equal to 10
LichenScript supports the four standard arithmetic operators for all number types:
- Addition (
+
) - Subtraction (
-
) - Multiplication (
*
) - Division (
/
)
1 + 2 // equals 3
5 - 3 // equals 2
2 * 3 // equals 6
10.0 / 2.5 // equals 4.0
The addition operator is also supported for string
concatenation:
"hello, " + "world" // equals "hello, world"
LichenScript supports the following comparison operators:
- Equal to (a
==
b) - Not equal to (a
!=
b) - Greater than (a
>
b) - Less than (a
<
b) - Greater than or equal to (a
>=
b) - Less than or equal to (a
<=
b)
Each of the comparison operators returns a Bool value to indicate whether or not the statement is true:
1 == 1 // true because 1 is equal to 1
2 != 1 // true because 2 isn't equal to 1
2 > 1 // true because 2 is greater than 1
1 < 2 // true because 1 is less than 2
1 >= 1 // true because 1 is greater than or equal to 1
2 <= 1 // false because 2 isn't less than or equal to 1