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A decimal separator is a symbol used to separate the integer part from the fractional part of a number written in decimal form.
Different countries officially designate different symbols for the decimal separator. The choice of symbol for the decimal separator also affects the choice of symbol for the thousands separator used in digit grouping, so the latter is also treated in this article.
It is often referred to by various other generic names, e.g., decimal mark, decimal marker, or decimal sign, or after the regional representation, e.g., decimal point. When the context is clear, it could also...