conditional statement

Answered

Ramesh singh

• March 18, 2023 13:35

Hi, 

  m.addConstr((C==1)>>(D==5))  Where C is the optimized variable variable. D is assigned 5 when C is 1. When C is 0 then D must be zero. It gives garbage value.. Please let me know how it can be assured the binary variable is 0 then D==5 expression should not execute or it's value shoud be zero.  

Related to

• Indicator Constraints

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• 

  Simranjit Kaur

  Gurobi Staff

  • March 19, 2023 22:24

  Hi Ramesh,

  To ensure that D is zero when the binary variable C is zero, you can add another indicator constraint:

   m.addConstr( (C==0) >> (D==0) )

  Alternatively, you can add a Big-M constraint, m.addConstr( D <= M*C ), where M is a sufficiently large number.

  Cheers,

  Simran

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