# Golang : Calculations using complex numbers example

Alright, you need to calculate the last known position of UFOs and their flying trajectory in Golang or you just want to perform some calculations using complex numbers.

Declaring complex numbers and performing calculations on the numbers is simple in Golang. Pretty much similar to how Python declare complex numbers.

In Python:

```
>>> a = complex(100,8)
>>> a
(100+8j)
>>> a.real
100.0
>>> a.imag
8.0
```

In Golang and some examples on how to perform calculations with `math/cmplx`

package:

```
package main
import (
"fmt"
"math/cmplx"
)
const a = complex(100, 8)
const b = complex(8, 100)
func main() {
fmt.Println("Complex number a : ", a)
fmt.Println("Complex number b : ", b)
fmt.Println("Get the real part of complex number a : ", real(a))
fmt.Println("Get the imaginary part of complex number b : ", imag(a))
conjugate := cmplx.Conj(a)
fmt.Println("Complex number a's conjugate : ", conjugate)
c := a + b
fmt.Println("a + b complex number : ", c)
fmt.Println("Cosine of complex number b : ", cmplx.Cos(b))
// see https://golang.org/pkg/math/cmplx/
// for more functions such as sine, log, exponential
}
```

Happy coding!

**References:**

https://en.wikipedia.org/wiki/Complex_number

https://golang.org/pkg/builtin/#complex

https://golang.org/pkg/math/cmplx/

https://www.socketloop.com/references/golang-builtin-complex-function-example

##### By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.

#### Advertisement

#### Tutorials

+3.4k Golang : Gorrila set route name and get the current route name

+16.1k Golang : Create PDF file from HTML file

+1k Golang : Converting individual Jawi alphabet to Rumi(Romanized) alphabet example

+4.7k Random number generation with crypto/rand in Go

+2.8k AWS S3 : Prevent Hotlinking policy

+2.5k Golang : Issue HTTP commands to server and port example

+2.8k Unix/Linux : How to test user agents blocked successfully ?

+6.1k Golang : Setting variable value with ldflags

+6.4k Golang : Get uploaded file name or access uploaded files

+3.1k Get Facebook friends working in same company

+2.7k Golang : How to pass map to html template and access the map's elements