typora/note/Shell/嵌套循环.md

#! /bin/env bash

read -p "input a number:" num
for ((i=1;i<=$num;i++))
do
	for ((j=1;j<=i;j++))
	do
		echo -n $j
	done
	echo
done



for ((i=1;i<=$num;i++))
do
	str=""
	for ((j=1;j<=i;j++))
	do
		str=$str$j
	done
	echo $str
done

me@me-EQ59:~/shell_demo/scripts/shell02$ ./print-1-5.sh
input a number:6
1
12
123
1234
12345
123456
1
12
123
1234
12345
123456
me@me-EQ59:~/shell_demo/scripts/shell02$