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When the content in a file is going to copy,there is two way, 1.bit stream            FileInputStream and FileOutputStream are used to copy the content 2.character stream            FileReader and FileWriter are used to copy the content in the text file into another In these cases finally the files should be closed after checking the files are null or not.

Photomath is an amazing and interesting mobile application. And it proccess the photo and detect the numbers we have wrote on a page. After it produce the answer after calculating and there is another way to edit if the detected equation is wrong.

In sololearn mobile application which is a coding platform for learners who like to learn about languages is providing some badges to whom achieves some regarding tasks in this application: profile

Ruby tutorial was finished and a certificate was issued in www.sololearn.com