What is the part of a computer instruction that specifies the operation function it performs called?

What is the part of the computer instructions that specifies the functions of the operations it performs called?

In computer instructions, the part that specifies the operation function it performs is called Operation code, and the opcode indicates the type of operation completed by the instruction.

The opcode refers to the part of the instructions or fields (usually represented by codes) specified in the computer program to perform the operation. It is actually the instruction sequence number used to tell the CPU Which instruction needs to be executed.

Instruction

Each instruction in the instruction system has an opcode, which indicates the nature of the operation that the instruction should perform. Different instructions are represented by different encodings of the opcode field, and each encoding represents an instruction. The number of bits that make up the opcode field generally depends on the size of the computer's instruction set.

"Operation code" English comparison

new; operation code; function code; operating code;opcode

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