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Comparative

The dyad = has a result of 1 if its left and right argument are equal, and a result of 0 if they are different.
   23 = 34
0
   23 = 23
1
   a =. 'd'
   a = 'c'
0
   7 + a = 'c'
7
   7 + a = 'd'
8
Some programming languages treat the results of comparative primitives such as = as True and False values that are not numbers. In J the results of comparatives are just numbers.

There are several other comparative verbs: less-than < , less-or-equal <: , larger-than > , and larger-or-equal >: . These comparative primitives are sometimes called relationals.
   7 < 8
1
   7 < 7
0
   7 <: 7
1
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