A Benchmark Fraction.
If Zero is the description of nothing then it would be a useful reference point as everything else can be clearly defined
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Benchmark
place value is the place of the number in reference to the decimal point, either to the right or left by how many places. face value refers to the number diregarding the positive or negative
Their position relative to a reference point - often the origin.
It is because many things are measured with reference to a fixed point: it space or time. This point is called a reference point or origin.
Pointer in C are fun to programming.Pointers in C are variables which doesn't stores the value but points to the address where the value is stored.They are used for reference.