順三角
#!/bin/bash
read -p "Please input the line number:" line
for ((i=1; i<=$line; i++))
do
for ((k=$line-$i; k>0; j--))
do
echo -n " "
done
for ((h=1; h<=$((2*$i-1)); h++))
do
echo -n "*"
done
echo
done
倒三角
#!/bin/bash
read -p "Please input the line number:" line
for ((i=0; i<$line; i++))
do
for ((k=$i; k>0; k--))
do
echo -n " "
done
for ((h=$((2*($line-$i)-1)); h>0; h--))
do
echo -n "*"
done
echo
done