Ввод буквенных значений

[nastya118]

Ожидаемый результат:
Программа не должна реагировать на ввод букв или же должна выдавать сообщение об ошибке.

Шаги:

1. Открыть калькулятор.
2. Кликнуть по полю ввода.
3. Ввести буквы с клавиатуры.

Фактический результат:
Программа разрешает вводить буквы.

[anonymous]

Aimore Tech is the best software training institute.
​AngularJs Training in Chennai | ​Data Science Training in Chennai | ​Clinical Sas Training in Chennai | ​Data Warehousing Training in Chennai | ​Tableau Training in chennai | ​Qlikview Training in chennai | ​Jenkins Training in chennai | ​Linux Training in chennai

[anonymous]

Nowadays biker Jackets are on top trend so buy amazing ​Motorcycle Jackets For Men which we made from high-quality leather material. these jackets are available in our store check now and get your favorite motorcycle jacket now.

[GOSTOPSITE23]

I REALLY LIKE THE MANY BLOGPOSTS, I SERIOUSLY LIKED, I WANT DETAILS ABOUT IT, SINCE IT IS RATHER WONDERFUL., THANKS

​https://www.gostopsite.com

[TOTOSITEWEB23]

HI I JUST WANT TO SAY THAT ALL THE CONTENTS YOU MENTIONED IN POST IS TOO GOOD AND CAN BE VERY USEFUL. I WILL KEEP IT IN MIND, THANKS FOR SHARING THE INFORMATION KEEP UPDATING, LOOKING FORWARD FOR MORE POSTS. THANKS

​https://www.totositeweb.com

[GUIDE03]

I AM ALWAYS SEARCHING ONLINE FOR ARTICLES THAT CAN HELP ME. THERE IS OBVIOUSLY A LOT TO KNOW ABOUT THIS. I THINK YOU MADE SOME GOOD POINTS IN FEATURES ALSO. KEEP WORKING AND GREAT JOB!

​https://www.19guide03.com

[TOTOSAFEDB23]

I ENJOY EACH OF THE PERFORM THAT YOU HAVE PLACED INTO THIS. I AM SURE THAT YOU WILL BE MAKING A REALLY USEFUL PLACE. I HAS BEEN ADDITIONALLY PLEASED. GOOD PERFORM!

​https://www.totosafedb.com