I've declared variable "x" but i did not call it, is it ok to not call variables that have values assigned?

import random


def add_sums(Num):
    total = 0
    all_num = []
    for x in range(1, Num+1):
        gen = random.randint(1, 30)
        all_num.append(gen)
    
    print("List:", all_num)
    for y in all_num:
        total += y
    print("List total:", total)


user_max = int(input("Max numbers in list: "))
add_sums(user_max)

In this program, the user will enter the total amount of numbers in a list. the random module will generate random numbers between 1 to 30. Then all the numbers from the list will be added together.

I've tried to use the variable x but it doesn't give the results I want, does anyone know a better/simpler way of creating this program. Also, is it bad practice to create a variable and not call it?