A programming language is a type of written language that tells computers what to do. Examples are: Python, Ruby, Java, JavaScript, C, C++, and C#. Programming languages are used to write computer programs and computer software. A programming language is like a set of commands that tell the computer how to do things.
Usually, the programming language uses real words for some of the commands (e.g. "if... then... else...", "and", "or"), so that the language is easier for a human to understand. Like any normal language, many programming languages use punctuation. To make a program, a programmer writes commands in their chosen programming language and saves the commands to a text file. This text file is called source code. Some programming languages, such as Python and JavaScript, can be read by the computer right away. If not, the source code has to be compiled, which means that the computer translates the source code into another language (such as assembly language[1][2] or machine language) that a computer can read, but which is much harder for a person to read.
Computer programs must be written very carefully. If a programmer makes mistakes, then the program might then stop working, which is called "crashing". When a program has a problem because of how the code was written, this is called a "bug". A very small mistake can cause very serious bugs.
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