variable caluculation

[Kohli]

What is result for the variables vValue and vSum ?

SUB A

SET vValue= 5+6;

ENDSUB ;

SUB B

LET vSum=  $(vValue)+4;

ENDSUB;

SUB C

LET vValue=;

LET vSum=;

ENDSUB;

SET vValue=56;

SET vsUM=75;

CALL A;

CALL B;

CALL C;

[sunny_talwar]

After the complete script run? It should be null because CALL C; will put them to be null assuming SET vsUM=75; is actually SET vSum=75;