/*****************************************************************************************************************
 
SAS file name: resolve_sysevalf.sas
File location: 
__________________________________________________________________________________________________________________
 
Purpose: To demonstrate how to use the Resolve Function and the %Sysevalf Macro function to evaluate expressions stored in a character variable in the SAS Data Step
Author: Peter Clemmensen
Creation Date: 17/03/2020
 
This program supports the blog post "Evaluate Arithmetic Expression in Character Variable" on SASnrd.com

*****************************************************************************************************************/

%let expr = 2.5*2**2+1;
%let num = %sysevalf(&expr);
%put #

data test;
   expr = '2.5*2**2+1';
   num  = input(resolve('%sysevalf('||expr||')'), 8.);
run;