How to return the output of program in a variable?

Question

Can any one tell me how to return the output of a program in a variable from command line?

var = ./a.out params

I am trying to get the output of program into a variable while running this from command line.

Answer 1

To save the program output to stdout in variable in Unix shell, regardless of language program wrote in, you can use something like this

var=`./a.out params`

or this

var=$(./a.out params)

Remember not to put spaces before or after the = operator.