Ada Operators

--- Logical ---
and	-- Boolean and	  -- &&
or	-- Boolean or	  -- ||
xor     -- Boolean xor
not     -- Boolean not    -- ~
        -- Highest precedence

--- Relational ---
=       -- Equals         -- ==
/=      -- Not equals     -- !=
<       -- Less than
>       -- More than
<=      -- Less or equal to
>=      -- More or equal

--- Unary ---
+       -- Positive -- +1
-       -- Negative -- -1

--- Binary ---
+      -- Addition      -- 1+2
-      -- Subtraction   -- 1-2
&      -- Concatenation -- 'a'& 'b' = "ab"

--- Multiplicatives ---
*     -- Multiplication
/     -- Division
mod   -- Modulus -- %  -- 0..m
rem   -- Remainder     -- Can be negative 
abs   -- Absolute Value
      -- Highest precedence
**    -- Power    

--- Logic extension ---
-- (Fake Operators) --
and then  -- Short circuited and
or else   -- Short circuited else
in        -- Value in range
not in    -- Short for not( ...in...)

Boolean operations: and, or, not, xor
Comparisons: >, >=, <, <=, =, /=
Unary operations: +, -, abs
Binary Operations: +, -, *, /, mod, rem, &, **

Short circuiting operations are not considered true operators, and as such, can't be overloaded. Same for membership operators (in).

Assignment := is considered a statement, not an operator.

& is a binary operator that, by default, concatenates two arrays of fixed length (or elements) into a new fixed array.

-- function "&" (Left  : in Element; Right : in Element)
--          return array_Type;

type Vector is array (1 .. 5) of Integer;
V1, V2 : Vector;
...
V1 & V2

'a' & "BCDE"