rhai/doc/src/language/num-op.md

Numeric Operators

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Numeric operators generally follow C styles.

Unary Operators

Operator	Description
+	Plus
-	Negative

let number = -5;

number = -5 - +5;

Binary Operators

Operator	Description	Integers only
+	Plus
-	Minus
*	Multiply
/	Divide (integer division if acting on integer types)
%	Modulo (remainder)
~	Power
&	Bit-wise And	Yes
|	Bit-wise Or	Yes
^	Bit-wise Xor	Yes
<<	Left bit-shift	Yes
>>	Right bit-shift	Yes

let x = (1 + 2) * (6 - 4) / 2;  // arithmetic, with parentheses

let reminder = 42 % 10;         // modulo

let power = 42 ~ 2;             // power (i64 and f64 only)

let left_shifted = 42 << 3;     // left shift

let right_shifted = 42 >> 3;    // right shift

let bit_op = 42 | 99;           // bit masking