题解 | #打印等腰三角形#

#!/bin/bash

read num
for(( i=1; i<=$num; i++ ))
do
    for ((j=$num; j>$i; j--))
    do
        echo -n " "
    done
    for (( j=0; j<$i; j++ ))
    do
        echo -n "* "
    done
    printf '\n'
done