Computer programmer is a broad area but all jobs that have to do with programming have to do with computers and are difficult jobs. They have to write, test, and maintain very detailed instructions that a computer must follow to perform their instructions. Those are called programs. They also conceive, design, and test logical structures for solving problems by computer. The computer program tells the computer what to do. So it is very important that you know exactly what you are doing because if one character in the whole source code is wrong the whole program will not work.
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