Bash Scripting Multiplication table

Question

Hello I am wondering if anyone can help me : I try to make a multiplication table for my daughter, I don't know how to make it. This is how I want to look : 1 x 1 = ? answer if the answer is true then go to the next one 1 x 2 = ? but if the answer is false then ask again 1 x 1 = ? until the answer is Correct.

#!/bin/bash

# Multiplication table 

echo " --== Multiplication Table ==-- "
sleep 2
echo " Lesson 1"
sleep 1
echo ""


echo -n "1 x 1 = ? " ; read opt
if [ "$opt" = 1 ] 
then
echo "Correct!"
else 
echo "Wrong!"
fi

sleep 1 
echo ""
echo -n "1 x 2 = ? " ; read opt
if [ "$opt" = 2 ] 
then
echo "Correct!"
else 
echo "Wrong!"
fi

After the exercise is done until 10. Then show a result of how many correct answers has and how many Wrong. Example: Lesson 1 is finish you have 9 correct answers and 1 wrong answer !

Answer 1

You can use this script:

#!/bin/bash

# Multiplication table

echo " --== Multiplication Table ==-- "
sleep 2
echo " Lesson $1"
sleep 1
echo ""

wrong=0
correct=0
for i in {1..10}
do
    while true
    do
        echo -n "$1 x $i = ? " ; read opt
        if [ $opt = $(( $1 * $i )) ]
        then
            (( correct++ ))
            echo "Correct!"
            break
        else
            (( wrong++ ))
            echo "Wrong!"
        fi
    done
done

echo "Lesson $1 is finish you have $correct correct answers and $wrong wrong answer!"

You can run it with different params for any base. Such as ./script 5 for multiplication with 5.