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Day 5: Rounding with decimal placesDescription: Rounding to Decimal places
Objective: The purpose of this module is to round a given value to a certain number of decimal places.
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Decimal rounding is exactly the same as whole number rounding.

What we are doing is deciding are we closer to the next value by checking if we are more than half way from our current value to the next value.

If we are rounding to 1dp (decimal place) then we are counting as follows, 3.2, 3.3, 3.4, 3.5, 3.6.

If we are rounding to 2dp (decimal place) then we are counting as follows, 3.22, 3.23, 3.24, 3.25, 3.26.

 

If we are given the number 3.684 and asked to round to 1dp we want to know if we are closer to 3.6 or 3.7.  Because the number after the 3.6 is an 8 we know we are closer to 3.7 than 3.6 so we round to 3.7

 

If we are given the number 3.684 and asked to round to 2dps we want to know if we are closer to 3.68 or 3.69.  Because the number after the 3.68 is a 4 we know we are closer to 3.68 than 3.69 so we round to 3.68