例子一:绘制特殊图形
代码如下:
#!/bin/bash
MAX_NO=0
echo -n “Enter Number between (5 to 9) : “
read MAX_NO
if ! [ $MAX_NO -ge 5 -a $MAX_NO -le 9 ] ; then
echo “WTF… I ask to enter number between 5 and 9, Try Again”
exit 1
fi
clear
for (( i=1; i=i; s– ))
do
echo -n ” “
done
for (( j=1; j=1; i– )