How to solve if statement?

Question:How to solve if statement?

Posted: Jayaprakash J 25 Product: Maple

October 08 2019

I have a condition delta(k-r-1);k and r are integers;

if k-r-1=0,then delta(k-r-1)=1;

if k-r-1 not equal to 0,then delta(k-r-1)=0;

How to write this in if statement?

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