shellj脚本学习与工作

#!/bin/bash
# 等腰三角形
read -p "Please input the length: " n
for i in `seq 1 $n`
do
for ((j=$n;j>i;j--))
do
echo -n " "
done

for m in `seq 1 $i`
do
echo -n "* "
done
echo
done

# 直角三角形
read -p "Please input the length: " len
for i in `seq 1 $len`
do
for((j=1;j<=$i;j++))
do
echo -n "* "
done
echo
done