I'm curious why you put the question under mathematics? I guess it's a hard science and people want hard answers, eh?
No one actually knows what the life is exactly. Is it something that moves and grows and breathes. But some kinds of life don't move (think about trees) and some don't breathe really (like yeasts and viruses).
But maybe you were looking for the mathematical answer, which is "42."
In binary (the number system that computers and human bodies often use) that is "101010"
Which just means, on, off, on, off, on, off.
It means waking up, then going to sleep, and then doing it again. Stop, go, stop, go. Yes, no, yes, no.
The cycling back and forth between opposites is called an "oscillation" and life is basically a whole bunch of oscillating systems... we just go back and forth between pleasure and pain, good and evil, love and hate, hungry and full.
So the meaning of life is to experience pain and pleasure, good and bad, and love and hate, and try to make our experience better for ourselves and for other people.