Why in INR instruction no flags are modified?

In the INR (Increment Register) instruction, the operation increments the value of a specified register by one. This instruction does not modify any flags because it does not affect the status of the zero flag or the sign flag in a way that would be relevant for subsequent operations. Specifically, the zero flag is set only if the result is zero, which does not apply to an increment operation, while the sign flag does not change in a predictable manner either. Therefore, the design choice is made to keep the flags unchanged to avoid unnecessary complications in the execution flow.