Assign variable dapat menggunakan 2 cara:

1. menggunakan var
2. menggunakan shorthand := bila untuk changing value maka tiak menggunakan : hanya =

Rules of naming Variables

• A variable name consists of alphabets, digits, and an underscore.
• Variables cannot have other symbols ( $, @, #, etc).
• Variable names cannot begin with a number.
• A variable name cannot be a reserved word as they are part of the Go syntax like int, type, for, etc.

Data Types	Description	Examples
int	Integer numbers.	7123, 0, -5, 7023
float32 / float 64	Numbers with decimal points.	20.2, 500.123456, -34.23
complex	Complex numbers.	2+4i, -9.5+18.3i
string	Sequence of characters.	"Hello World!", "1 is less than 2"
bool	Either true or false.	true, false
byte	A byte (8 bits) of non-negative integers.	2, 115, 97
rune	Used for characters. Internally used as 32-bit integers.	'a', '7', '<'

Data type in integer

Data type	Size
int/uint	either 32 bits (4 bytes) or 64 bits (8 bytes)
int8/uint8	8 bits (1 byte)
int16/uint16	16 bits (2 bytes)
int32/uint32	32 bits (4 bytes)
int64/uint64	64 bits ( 8 bytes)

Operator

Operator	Example	Same as
+= (addition assignment)	a += b	a = a + b
-= (subtraction assignment)	a -= b	a = a - b
*= (multiplication assignment)	a *= b	a = a * b
/= (division assignment)	a /= b	a = a / b
%= (modulo assignment)	a %= b	a = a % b

Relational Operators

Operator	Example	Descriptions
== (equal to)	a == b	returns true if a and b are equal
!= (not equal to)	a != b	returns true if a and b are not equal
> (greater than)	a > b	returns true if a is greater than b
< (less than)	a < b	returns true if a is less than b
>= (greater than or equal to)	a >= b	returns true if a is either greater than or equal to c
<= (less than or equal to)	a <= b	returns true is a is either less than or equal to b

Logical Operators

Operator	Description	Example
&& (Logical AND)	exp1 && exp2	returns true if both expressions exp1 and exp2 are true
(Logical OR)	exp1 OR exp2	returns true if any one of the expressions is true.
! (Logical NOT)	!exp	returns true if exp is false and returns false if exp is true.