How can I save the values in a file ?

I have a question in bash shell programming. How can I save the values by typing a user in a file. I didn't get to use>

eg
#! / bin / bash
Giving value echo a # before a value
read a
echo Giving value b # input value b
read b
touch data # creation of a data file to store the values of a and b
$ a: $ b> # redirection data values of variables a and b in the data file

Is it right ?

Thanks

#! / bin / bash
echo Giving value
read a
echo Giving value b
read b

echo "$ (a): $ (b)"> data