#!/bin/bash
for a in {1..9};do
for b in `seq 1 $a`;do
let c=$a*$b ;echo -e "${a}x${b}=$c\t\c"
done
echo
done
#!/bin/bash
read -p "Please input a num: " num
if [[ $num =~ [^0-9] ]];then
echo "input error"
else
for i in `seq 1 $num` ;do
xing=$[2*$i-1]
for j in `seq 1 $[$num-$i]`;do
echo -ne " "
done
for k in `seq 1 $xing`;do
color=$[$[RANDOM%7]+31]
echo -ne "\033[1;${color};5m*\033[0m"
done
echo
done
fi
#!/bin/bash
red="\033[1;41m \033[0m"
yellow="\033[1;43m \033[0m"
for i in {1..8};do
if [ $[i%2] -eq 0 ];then
for i in {1..4};do
echo -e -n "$red$yellow";
done
echo
else
for i in {1..4};do
echo -e -n "$yellow$red";
done
echo
fi
done