Shell assign variable to another variable

Shell Programming and Scripting
1

How can I assign a variable to an variable. IE $car=honda

One way I can do it is export $car=honda
or
let $car=2323

Is there any other ways to preform this task

2

The answer depend on your shell
For sh/bash/ksh

car=honda
new_car=$car
echo $new_car
honda

for csh/tcsh

set car = honda
set new_car = $car
echo $new_car
3

My question was asking how to set a variable to another variable
like
car=honda
export ${car}=blue
echo $honda
blue

4 
#!/bin/bash
car=honda
declare $car=blue
echo $honda
blue

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