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[SOLVED] finding the difference between 2 numbers?


shadiadiph

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MM odd question here if I have two numbers that have values such as

 

$current = 1.4567

$last = 1.4698

 

how do i find out the difference between the two numbers sometimes the values might be the otherway round the one above should produce a negative but if $current was 1.4824 the difference would be positive how can i determine this positive negative difference? 

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