I would like to know which is the most popular language for writing Mobile Software Applications ?
I want to create app for users.
C++ c C# php, HTML 5 etc
What about the Java?
Android is the world's most popular mobile platform until now :)
Android phones are the most popular, so u need Java Language but if u are an HTML 5 developper you can deploy and publish you work on different platforms like blackberry, windows phone,ios...
You can learn C/C++ Programming languages, so your logic is clear. Then after that you can read Java Programming language. There are lots of android application development using Java code.
As a mobile application developer, you need to think about all mobile application languages, so you can easily create any apps. Androids need Java language, iPhone need C/C++ language concepts.
Most popular programming languages of 2014:
I personally prefer C# for ease of use, documentation and developer community. For cross platform C# take a look at Xamarin: http://xamarin.com/