play_lvl_vars.yml

---
 - name: Play1
   hosts: room2
   become: yes
   vars:
     - var1: crond
     - var2: data
   tasks:
     - name: Restarting Service {{ var1 }}
       service: name={{ var1 }} state=restarted

     - name: creating directory {{ var2 }}
       file: name=~/{{ var2 }} state=directory

 - name: Play2
   hosts: room3
   become: yes
   vars:
     - var1: crond
   tasks:
     - name: Printing MSG
       debug: msg={{ var1 }}

#GLOBAL/RUNTIME VARIABLES#
#ansible-playbook -e var1=httpd -e var2=mydata play_lvl_vars.yml