In the C and C++ programming languages, #pragma once is a non-standard but widely supported preprocessor directive designed to cause the current source file to be included only once in a single compilation.
During sexual reproduction, fertilization of the ovum (n, 23 chromosomes) by the sperm (n, 23 chromosomes) restores the diploid number and creates a zygote (2n, 46) (awww..) that divides and grows by mitosis to form a multicellular human.
There are 23 pairs of chromosomes in each cell of our body. These Chromosomes plays a vital role in our body even in human Intercouse . When the Humans undergo sexual inter-course , single high energetic sperm enters the ovum and fuses with it to produce the embryo later develops into a child .