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Golang Operators

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Operators

An operator is a symbol that tells the compiler to perform certain actions. The following lists describe the different operators used in Golang.

  • Arithmetic Operators
  • Assignment Operators
  • Comparison Operators
  • Logical Operators
  • Bitwise Operators

Arithmetic Operators in Go Programming Language

The arithmetic operators are used to perform common arithmetical operations, such as addition, subtraction, multiplication etc.

Here's a complete list of Golang's arithmetic operators:

Operator Description Example Result
+ Addition x + y Sum of x and y
- Subtraction x - y Subtracts one value from another
* Multiplication x * y Multiplies two values
/ Division x / y Quotient of x and y
% Modulus x % y Remainder of x divided by y
++ Increment x++ Increases the value of a variable by 1
-- Decrement x-- Decreases the value of a variable by 1

The following example will show you these arithmetic operators in action:

Example

package main

import "fmt"

func main() {
	var x, y = 35, 7

	fmt.Printf("x + y = %d\n", x+y)
	fmt.Printf("x - y = %d\n", x-y)
	fmt.Printf("x * y = %d\n", x*y)
	fmt.Printf("x / y = %d\n", x/y)
	fmt.Printf("x mod y = %d\n", x%y)

	x++
	fmt.Printf("x++ = %d\n", x)

	y--
	fmt.Printf("y-- = %d\n", y)
}

Output

x + y = 42
x - y = 28
x * y = 245
x / y = 5
x mod y = 0
x++ = 36
y-- = 6

Assignment Operators in Go Programming Language

The assignment operators are used to assign values to variables

Assignment Description Example
x = y Assign x = y
x += y Add and assign x = x + y
x -= y Subtract and assign x = x - y
x *= y Multiply and assign x = x * y
x /= y Divide and assign quotient x = x / y
x %= y Divide and assign modulus x = x % y

The following example will show you these assignment operators in action:

Example

package main

import "fmt"

func main() {
	var x, y = 15, 25
	x = y
	fmt.Println("= ", x)

	x = 15
	x += y
	fmt.Println("+=", x)

	x = 50
	x -= y
	fmt.Println("-=", x)

	x = 2
	x *= y
	fmt.Println("*=", x)

	x = 100
	x /= y
	fmt.Println("/=", x)

	x = 40
	x %= y
	fmt.Println("%=", x)
}

Output

=  25
+= 40
-= 25
*= 50
/= 4
%= 15

Comparison Operators in Go Programming Language

Comparison operators are used to compare two values.

Operator Name Example Result
== Equal x == y True if x is equal to y
!= Not equal x != y True if x is not equal to y
< Less than x < y True if x is less than y
<= Less than or equal to x <= y True if x is less than or equal to y
> Greater than x > y True if x is greater than y
>= Greater than or equal to x >= y True if x is greater than or equal to y

The following example will show you these comparison operators in action:

Example

package main

import "fmt"

func main() {
	var x, y = 15, 25

	fmt.Println(x == y)
	fmt.Println(x != y)
	fmt.Println(x < y)
	fmt.Println(x <= y)
	fmt.Println(x > y)
	fmt.Println(x >= y)
}

Output

false
true
true
true
false
false

Logical Operators in Go Programming Language

Logical operators are used to determine the logic between variables or values.

Operator Name Description Example
&& Logical And Returns true if both statements are true x < y && x > z
|| Logical Or Returns true if one of the statements is true x < y || x > z
! Logical Not Reverse the result, returns false if the result is true !(x == y && x > z)

The following example will show you these logical operators in action:

Example

package main

import "fmt"

func main() {
	var x, y, z = 10, 20, 30

	fmt.Println(x < y && x > z)
	fmt.Println(x < y || x > z)
	fmt.Println(!(x == y && x > z))
}

Output

false
true
true

Bitwise Operators in Go Programming Language

Bitwise operators are used to compare (binary) numbers.

Operator Name Description
& AND Sets each bit to 1 if both bits are 1
| OR Sets each bit to 1 if one of two bits is 1
^ XOR Sets each bit to 1 if only one of two bits is 1
<< Zero fill left shift Shift left by pushing zeros in from the right and let the leftmost bits fall off
>> Signed right shift Shift right by pushing copies of the leftmost bit in from the left, and let the rightmost bits fall off

The following example will show you these bitwise operators in action:

Example

package main

import "fmt"

func main() {
	var x uint = 9  //0000 1001
	var y uint = 65 //0100 0001
	var z uint

	z = x & y
	fmt.Println("x & y  =", z)

	z = x | y
	fmt.Println("x | y  =", z)

	z = x ^ y
	fmt.Println("x ^ y  =", z)

	z = x << 1
	fmt.Println("x << 1 =", z)

	z = x >> 1
	fmt.Println("x >> 1 =", z)
}

Output

x & y  = 1
x | y  = 73
x ^ y  = 72
x << 1 = 18
x >> 1 = 4
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