Answer Posted / sanah

In Computer Science terminology(world) Real numbers are those which have decimal points.
These real numbers are categorized in 2 ways.
1.Float and
2.Double

Memory used by these two differs based on the programming language on which we works.
For Example in C:-
Float:-It uses only 4 bytes of memory
Double:-It uses 8 bytes of memory
The only difference between these two is that---
Float can hold only 4 bytes(ex:2.4509)
Double is used to hold 8 bytes(ex:2.450877777777777777779)
i.e
if(real_no is larger)
{
we go for double;//remember double is a real
}
else
{
we go for float;//remember float is also a real
}

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