Opcodes
Low-level operations.
The EVM Instruction Set
At its lowest level, the EVM runs a sequence of opcodes — single-byte instructions that each do one thing.
Understanding opcodes reveals what your Solidity actually does and where gas goes.
What Is an Opcode?
An opcode (operation code) is a one-byte command the EVM executes. Examples include ADD, MUL, PUSH1, SLOAD, and JUMP.
Each opcode has a name, a numeric value, and a fixed gas cost.
0x01 = ADD
0x02 = MUL
0x60 = PUSH1
0x54 = SLOAD
0x56 = JUMP