range_int that works like range in Python

range_int.go

package main

import (
	"fmt"
)

func range_int(start int, end int, step int) func() (int, bool) {
	current := start
	previous := 0
	return func() (int, bool) {
		if current < end {
			previous = current
			current += step
			return previous, false
		} else {
			return 0, true
		}
	}
}

func main() {
	fmt.Println("Hello, playground")
	r := range_int(0, 10, 3)
	for val, isEnd := r(); !isEnd; val, isEnd = r() {
		fmt.Println(val)
	}
}