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specification/protocol/blockchain/script/op-codes/op-x.md
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2019-12-26 16:55:17 -05:00
# OP_X
The OP_X op codes add a numerical value to the top of the stack. OP_0 pushes an empty byte array which is interpreted as the numerical value 0. The rest push a single byte to the top of the stack as a [two's_complement](https://en.wikipedia.org/wiki/Two%27s_complement) integer. OP_1 pushes a 1, OP_2 pushes a 2, and so on through OP_16, which adds a 16 (0x10).
# OP_TRUE and OP_FALSE
OP_FALSE is an alias for OP_0 while OP_TRUE is an alias for OP_1.