Not able to read variable in unix

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hi,

trying display variable's value in terminal of mac. not happening.

steps do-

set var = 2
echo $var

should display 2, empty line shown.
think need set env variable.but not know details. please help.
 

which shell this?

if "bash"

try this
var=2
echo $var.

if running "csh" be
setenv var 2
echo $var

title says "in unix" yes mac os based on unix unix name of os.. typing commands program called shell. there several shells can use. mac os x ships @ least 3 shells , pick runs each account
 


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