Stop main() function from starting automatically

After the first run of the program(when i input the choice) the main function starts automatically again , i want to make it so that it doesnot start automatically ,instead ask if u want to run the program again or exit the program , if i chose to run the program the main() function starts again else the program ends.

file=open("nomobile.txt","w")
text=" If The worLd was Ending , yOU WIll come over right, u will come over and stay the 9it"
file.write(text)

file=open("nomobile.txt",'r')
characters=file.read()


vowels=0

consonants=0

uppercase=0

lowercase=0

for ch in characters:

    if ch.islower():
        lowercase+=1
    elif ch.isupper():
        uppercase+=1
    ch=ch.lower()
    if ch in "aeiou":
        vowels+=1
    elif ch in "bcdfghjklmnpqrstvwxyz":
        consonants+=1
file.close()

def main():
    
    while True:
        print("What do you want to know about?")
        print("Press 1 to know about uppercase letters")
        print("Press 2 to know about lowercase letters")
        print("Press 3 to know about vowels")
        print("Press 4 to know about consonants")
        print("Press 5 to know about all of them at once")

        choice=int(input("Press number:"))
        if choice == 1:
            print("The number of uppercase letters present are", uppercase)
        elif choice == 2:
            print("The number of lowercase letters present are", lowercase)
        elif choice == 3:
            print("The number of vowels present are",vowels)
        elif choice == 4:
            print("The number of consonants present are",consonants)
        elif choice == 5:
            print("The number of uppercase letters present are", uppercase)
            print("The number of lowercase letters present are", lowercase)
            print("The number of vowels present are",vowels)
            print("The number of consonants present are",consonants)
        else:
            break
        

main()