题解 | #打印等腰三角形#

#!/bin/bash
read -p "Please enter BianChang:" n
#r变量为行数，kg变量为空格数
for ((r = 1; r <= n; r++)); do
	kg=$(($n - $r))	
	for ((i = 1; i <= $kg; i++)); do
		echo -n " "
	done
	for ((j = $r; j > 0; j--)); do
		echo -n "*"
		echo -n " "
	done
	echo ""
done