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There is a OP_EQUAL opcode that returns (from the Bitcoin wiki):

1 if the inputs are exactly equal, 0 otherwise

And a OP_NUMEQUAL opcode that returns:

1 if the numbers are equal, 0 otherwise

In the case where you want to use OP_NOTEQUAL it is suggested to use OP_NUMNOTEQUAL so it seems like OP_EQUAL and OP_NUMEQUAL can be used interchangeably when dealing with integers:

//case OP_NOTEQUAL: // use OP_NUMNOTEQUAL

What is the point of the OP_NUMEQUAL opcode? Can’t you just always use OP_EQUAL instead? Is OP_NUMEQUAL more efficient than OP_EQUAL when dealing with integers?

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By pplny

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