Rexxboy02

import time
error = 0
while error == 0 :
    try:
        vi = int(input("Porcentaje a alcanzar: "))
        for num in range (vi):
            print (f"Loading...{num + 1}%")
            time.sleep (0.3)
        print("Ready")
        error = 1

Rexxboy02

var1 = 0
vi = input("Porcentaje a alcanzar:")
for x in range (var1, int(vi)):
    print ("Loading...", var1,"%")
    var1 += 1
print("Ready")

Rexxboy02

#Escribe "LoadingX%" hasta que Var1 = 100, entonces escribe "Ready!"
import time
Var1 = 0
while Var1 != 100 :
    print("Loading... ", Var1,"%")
    time.sleep (0.3)
    Var1 = Var1 + 1
print("Ready!")