the-way-to-go_ZH_CN/eBook/exercises/chapter_5/for_character.go

package main

func main() {
	// 1 - use 2 nested for loops
	for i:=1; i <= 25; i++ {
		for j:=1; j <=i; j++ {
			print("G")
		}
		println()
	}
	// 2 -  use only one for loop and string concatenation
	str := "G"
	for i:=1; i <= 25; i++ {
		println(str)
		str += "G"
	}	
}