Go program to print the Mandelbrot set on stdout

mandelbrot.go

// Print the Mandelbrot set on stdout

package main

import (
	"fmt"
	"math/cmplx"
)

const (
	width      = 160
	height     = 60
	min        = -2.1 - 1.2i
	max        = 0.6 + 1.2i
	iterations = 32
	colors     = ".-+*%#$@ "
)

func main() {
	incX := complex(real(max-min)/width, 0)
	incY := complex(0, imag(max-min)/height)
	c := min
	for row := 0; row < height; row++ {
		for col := 0; col < width; col++ {
			z := 0 + 0i
			var i int
			for i = 0; i < iterations; i++ {
				z = z*z + c // The core Mandelbrot equation!
				if cmplx.Abs(z) > 2 {
					break
				}
			}
			fmt.Printf("%c", colors[i*(len(colors)-1)/iterations])
			c += incX
		}
		fmt.Printf("\n")
		c += incY - real(max-min)
	}
}

Runnable version: https://play.golang.org/p/oxo5iXlIzLe