"for numbers with many digits the digits may be divided into groups of three by a thin space, in order to facilitate reading. More specifically in an official document they introduce the concept of "thin space": "Spaces should be used as a thousands separator (1000000) in contrast to commas or periods (1,000,000 or 1.000.000) to reduce confusion resulting from the variation between these forms in different countries." Since 2003, the Internationa Standard of Units regulated that groups of three are to be separated by spaces and not dots or commas:
Number_format( $number, '.', '&thinsp ' )
#Numeric precision archive#
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