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Trailing zer0 after using round function.


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After using round function i got €128.7 . Is there any ready made function to get get 128.70 ? (with a trailing 0). I can change it using regex  by [0-9]+(\.[0-9][0-9]) (totally guessing)but is there any function to do so ?


$BP = round(128.6985 , 2); 



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