I am trying to make a simple calculator. I am sure if you even just glanced at this code you will see what I am trying to do.
Enter a number, then choose an operand, then vim should print out a table up to 15 with your number and operand...

Maybe this method is silly, trying to nest a load of loops in nested if statements. But I am new to bash.

The error is 'Unexpected token near else' line 24 but I feel there is a fundamental issue with the nests I do not understand.

Here is current code.

```
#!/bin/bash
choice=6
read -p "Enter a number bruv" num
#choose operand.
echo "Now choose an operand comrade"
#choices

echo "1. *"
echo "2. +"
echo "3. -"
echo "4. /"
echo "5. ^"

echo -n "Please choose [1,2,3,4,5]"

while [ $choice -eq 6 ]; do
        read choice

        if [ $choice -eq 1 ] ; then
                for((i=0;i<=15;i++))
                do
                echo -n "$i * $num = $[ $i * $num ] "
                echo " "
        else
                if [ $choice -eq 2 ] ; then
                        for((i=0;i<=15;i++))
                        do
                        echo -n "$i + $num = $[ $i + $num ] "
                        echo " "
                else
                        if [ $choice -eq 3 ] ; then
                                for((i=0;i<=15;i++))
                                do
                                echo -n "$i - $num = $[ $i - $num ] "
                                echo " "
                        else
                                if [ $choice -eq 4 ] ; then
                                        for((i=0;i<=15;i++))
                                        do
                                        echo -n "$i / $num = $[ $i / $num ] "
                                        echo " "
                                else
                                        if [ $choice -eq 5 ] ; then
                                       for((i=0;i<=15;i++))
                                        do
                                        echo -n "$i ^$num = $[ $i ^$num ] "
                                        echo " "
                                else echo "Please choose between 1 and 5!!!"
                                          echo "1. *"
                                         echo "2. +"
                                          echo "3. -"
                                          echo "4. /"
                                           echo "5. ^"
                                        echo -n "Please choose [1,2,3,4,5]"
                              fi
                     fi
             fi
        fi
     fi
done

```

Would it be better to implement this?

```
# !/bin/bash

# Take user Input
echo "Enter number : "
read a

# Input type of operation
echo "Enter Choice :"
echo "1. Addition"
echo "2. Subtraction"
echo "3. Multiplication"
echo "4. Division"
echo "5. Power"
read ch

# Switch Case to perform
# calulator operations
case $ch in
  1)res=`for((i=0;i<=15;i++))
                                do
                                echo -n "$i - $num = $[ $i - $num ] "
                                echo " "`
  ;;
  2)res=`for((i=0;i<=15;i++))
                                do
                                echo -n "$i - $num = $[ $i - $num ] "
                                echo " "`
  ;;
  3)res=`for((i=0;i<=15;i++))
                                do
                                echo -n "$i - $num = $[ $i - $num ] "
                                echo " "`
  ;;
  4)res=`for((i=0;i<=15;i++))
                                do
                                echo -n "$i - $num = $[ $i - $num ] "
                                echo " "c`
  ;;
esac
echo "Result : $res" ```

```