About while do loop,what is wrong with this code ?

[redcodeheaven]

Hello my teacher gave me an exercise to enter my name and 2 numbers the output must show the sum and the product of these 2 numbers and keep repeating the same procedure using a while loop till i answered "no" to a question if i want to continue,so I wrote this shell code but something is wrong ,I am using Ubuntu and vi editor:

#! /bin/bash
while :
do
echo "please enter your name"
read name
echo"please enter your first number"
read firstnumber
echo"please enter your second number"
read secondnumber
echo "sum of the 2 numbers are"
expr $firstnumber + $secondnumber

echo "product of the 2 numbers is"
expr $firstnumber \*  $secondnumber

echo " do you wish to continue? yes/no"
read input
if [$input =="no"]; then
break
fi
done

# anyway to improve it and what is wrong? thank you for help.

[ashitpro]

#! /bin/bash
while :
do
echo "please enter your name"
read name
echo "please enter your first number"
read firstnumber
echo "please enter your second number"
read secondnumber
echo "sum of the 2 numbers are"
expr $firstnumber + $secondnumber

echo "product of the 2 numbers is"
expr $firstnumber \* $secondnumber

echo " do you wish to continue? yes/no"
read input
if [ $input == "no" ]
then
break
fi
done

I've made some minor changes for you....
Compare this with original code...you'll come to know about problems...

[redcodeheaven]

Thank you ashitpro for your help but still the code is not working properly:
first it says about :"command not found" and secondly it seems like i can't get out of the loop when i press no.
Any further help ?thank you

[ashitpro]

Thank you ashitpro for your help but still the code is not working properly:
first it says about :"command not found" and secondly it seems like i can't get out of the loop when i press no.
Any further help ?thank you

Have you check out the spaces, that I've added..?
Have you compared this code with original one?
Use if then exactly as shown

if [ $input == "no" ]
then

there are spaces after and before $input and "no"