Problem Set3(Password Check)

Password Check

Q.Given a word, check if it is a valid password or not.  A password is said to be valid if it satisfies the following conditions:

i) Should begin with a letter

ii) Should contain atleast one digit and one special character

iii) Length of the password should be atleast 8

Print ‘Valid' if the given word satisfies the above three conditions  and print ‘Invalid’ otherwise.

Input format:

A word

Output format:

Print ‘Valid' if the given word satisfies the above three conditions  and print ‘Invalid’ otherwise.

Input:

The password(password)

Processing

length = len(password)

count_digit = 0

count_special = 0

for i in range(length):

    if i == 0:

        if password[0].isalpha() == False:

            break

    else:

        if password[i].isdigit() == True:

            count_digit+=1

            continue

        elif password[i].isalpha() == False:

            count_special+=1

            continue

Output:

Display if the password is Valid or Invalid.

Algorithm:

Step1. Get the password(password)

Step2. Initialize count_digit and count_special as zero

Step3. Let length variable be assigned as the length of the password.

Step4. Check if length is less than 8 if yes then diplay Invalid else proceed to step5

Step5. initialize i as 0 and repeat till i is less than length.

Step5.1 if i is equal to zero then check if ith character of the password variable is not an alphabet if true then break out of the loop.

Step5.2 if i is not equal to zero then proceed to step5.3

Step5.3 check if ith character of password is a digits list if true then increment count_digit variable by 1 and increment i by one and then move on to the loops starting point else move on to step 5.4

Step5.4 check if ith character of password is an alphabet if false then increment count_special variable by 1 and increment i by one and then move on to the start of the loop.

Step6. Check if both count_digit and count_special are not equal to zero if true display Valid else display Invalid.

Step7.End

Program:

password = input()

length = len(password)

count_digit = 0

count_special = 0

if length >= 8:

    for i in range(length):

        if i == 0:

            if password[0].isalpha() == False:

                break

        else:

            if password[i].isdigit() == True:

                count_digit+=1

                continue

            elif password[i].isalpha() == False:

                count_special+=1

                continue
if count_digit == 0 or count_special == 0:

    print('Invalid')

else:

    print('Valid')

Flowchart:

 To edit this flowchart click on this