"""
The error you're seeing is likely because you're 
trying to reference variables (plHP and enHP) before 
they are defined. Also, the condition while plHP or 
enHP >= 0 is not doing what you intend it to do. It 
should be checking both plHP and enHP individually.
"""

"""
I've combined the global declarations for variables in the same 
block for better readability.
I've called the Orc() and player() functions to initialize the 
variables before entering the while loop.
I've corrected the condition in the while loop to 
check both player and enemy HP individually. 
The loop continues as long as both plHP and enHP 
are greater than zero.
"""

import random

def Orc():
    global enName, enAtt, enHP, enDef, enMove, enExp

    enName = "Orc"
    enAtt = 0
    enDef = 13
    enMove = random.randint(0, 13)
    enExp = 100
    enHP = 100

def player():
    global plName, plAtt, plDef, plHP

    plName = input("What is your name?")
    plAtt = 10
    plDef = 13
    plHP = 50

Orc()  # Initialize enemy Orc
player()  # Initialize player

while plHP > 0 and enHP > 0:  # Check both player and enemy HP
    enHP -= plAtt
    print(plName, "has attacked", enName, "for", plAtt)