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one has .. and one has . its unequal
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There is no difference between improper subset and equal sets. If A is an improper subset of B then A = B. For this reason, the term "improper subset" is rarely used.
This function will accept two parameters and return the difference between the first and second parameter. function diffBetween ( a, b ) { return a-b; } //end diffBetween
Take the absolute value of the difference between the two numbers. The difference between two numbers a and b is a-b or b-a. The absolute value is whichever one of these is not negative. So 0 - (-3) = +3 so the distance is 3 units.