CODEWITHSUNDEEP
pythonfunctionloops
islam sulaiman
islam sulaiman

Reputation: 11

how to make continue function in python goes back to a specific line inside the loop, not through the entire loop

As a beginner, I want to make continue function in Python to go back to a specific line inside the loop not to start over without making double while loops, I will explain more by code.

The following program aims to take a name (letters only) and age (numbers only) from the user until valid inputs are given:

while True :
    name=input ('please enter your first name with no numbers ')
    if not name.isalpa():
        print('incorrect input, please enter another input')
        continue
    age = input ('''please enter your age 'numbers only' ''')
    if not age.isdecimal():
        # I want to use continue heer to jump back to the
        # age input line again not to the start of the loop

Upvotes: 0

Views: 594

Answers (2)

Hussain
Hussain

Reputation: 308

Try this approach:

while True :
    name=input ('please enter your first name with no numbers ')
    while(!name.isalpa()):
        print('incorrect input, please enter another input')
        name=input ('please enter your first name with no numbers ')
    age = input ('''please enter your age 'numbers only' ''')
    while(!age.isdecimal()):
        print('incorrect input, please enter another input')
        age=input ('''please enter your age 'numbers only' ''')

Upvotes: 1

Hemerson Tacon
Hemerson Tacon

Reputation: 2522

That's for sure a bad design. You should validate one input and then ask for another. But you can accomplish what you are asking for with an additional boolean variable:

isNameOk = False

while True :
    if not isNameOk:
        name=input ('please enter your first name with no numbers ')
        if not name.isalpa():
            print('incorrect input, please enter another input')
            continue
        isNameOk = True
    age = input ('''please enter your age 'numbers only' ''')
    if not age.isdecimal():
        print('incorrect input, please enter another input')
        continue

But I would strongly suggest something like this with two whiles:

name = input ('please enter your first name with no numbers ')
while not name.isalpha():
    name = input('please enter your first name with no numbers ')
            
age = input('please enter your age numbers only')
while not age.isdecimal():
    age = input('please enter your age numbers only')

Upvotes: 0

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