User Input Validation With A Do-While Loop | C++ Example

[@justfred6863]

Thanks alot, helped me for a college work!

[@PortfolioCourses]

You’re welcome, I’m glad to hear this helped you out! :-)

[@クリスチャン-y5f]

Thank you bro

[@sekke-c4f]

The video helps a lot thanks, but i have 1 question though why would you put the same condition on both if else statement and the while?

[@PortfolioCourses]

The if-statement and condition there is to output the error message, the loop and condition there is to keep the loop going and ask the user to input the month again if the input was invalid. :-)

[@210matrix]

simple and informative. Thanks

[@PortfolioCourses]

You’re welcome! :-)

[@jonnymcgrath4816]

How can I do the same for multiple input? (Im saying if I want to do for another loop for input validation?)

[@PortfolioCourses]

You could put one loop after the other, one at a time for each input. :-)

[@jonnymcgrath4816]

@@PortfolioCourses thx for the fast response :)

[@PortfolioCourses]

You're welcome! :-)

[@abdulhamidfayziyev9293]

Please can you do this problem and make video. "Write C++ program to print the following triangle of numbers where the example height depends on user input. In case 0 is entered , print the depth is 0. Use for loop" .

[@PortfolioCourses]

Maybe Abdulhamid, but what does the triangle of numbers look like though? It says "the following triangle of numbers" but there is no triangle of numbers.

[@abdulhamidfayziyev9293]

@@PortfolioCoursesfor example if you input 4 , output should look like this 4444 333 22 1

[@PortfolioCourses]

@@abdulhamidfayziyev9293 Hmm maybe I can do this, that doesn't seem too bad. 🙂

[@abdulhamidfayziyev9293]

@@PortfolioCourses when will you do this brother?

[@abdulhamidfayziyev9293]

@@PortfolioCourses can you do this within 15 hours.

[@MuhammadUsman-mk4ii]

What if we use string

[@ibrahimalnajjar277]

Error

[@Sizdothyx]

What if I want to initiate this loop in the case of other invalid characters as well? As in, let's say I only want a number between 1-5, but putting in a character such as "a", I find, still doesn't activate the loop. The program acts as if it's a valid input.

[@PortfolioCourses]

Great question! This loop is only setup to handle int values. If we wanted to handle any type of input, we could accept the user input as a string, perhaps by using getline: kzbin.info/www/bejne/paWVd6yriZqrpsk. We could then parse the string to first see if it contains a valid int value at all before checking to see if the int value is in range, perhaps using a simple technique such as this: www.tutorialspoint.com/how-to-check-if-a-c-cplusplus-string-is-an-int. 🙂

[@Adam-kk7nw]

Thanks

[@PortfolioCourses]

You're welcome Adam! :-)