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Modulo isn't the same in all languages, but I can't think of a C based language that doesn't use % as modulo. Always check the language basics documentation as they will indicate what the arithmetic and bitwise operations are (which I find are the ones that change the most). For example, in visual basic you use the Mod operator. Unfortunately implementation of modulo also changes slightly between languages.
The 'e' in this example isn't euler. Its exponent, so this is a block written an scientific notation. 0.3e+1 is the same as 3.0.
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