# [✓] Avoid problem with IF?

GROUPS:
 Good morning, sorry to bother you and take away some of your time, but I wanted to ask you for help with a problem I have with the IF command. Here is the algorithm of the program I am trying to perform:  l = {{p ^ 2, 85, 74}, {12, 96, 75}, {12, 74, 95}}; Det [l] a = Variables [Det [l]] b = Extract [a, 1] If [b == p, "YES", "NO"] -39936 + 3570 p ^ 2 {p} p "YES"  l = {{q ^ 2, 85, 74}, {12, 96, 75}, {12, 74, 95}}; Det [l] a = Variables [Det [l]] b = Extract [a, 1] If [b == p, "YES", "NO"] -39936 + 3570 q ^ 2 {q} q If [q == p, "YES", "NO"] If the condition is fulfilled it shows YES that is what I want, but if the condition is not fulfilled it does not show me "NO" but it shows If [b == p, "YES", "NO"] as text, please help me with this problem I would be very grateful. Thank you so much for your help.
 Gianluca Gorni 1 Vote Try with If[b === p, "YES", "NO"]. Written as b == p it is an equation, not an identity test.
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