What programming languages are most frequently used in the IT world?

In other words, what languages should I learn or spruce up on before I graduate next year and get a job?What programming languages are most frequently used in the IT world?
Java


C++


PHP


PerlWhat programming languages are most frequently used in the IT world?
C, C++ and Java are the most popular languages in the IT world.


Please consider the order of this chain, it is important.





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Java


C++


PHP
Java / C#


C++


PHP
ASP, PHP, .NET, VB, Java, C#
.net


visual basic