fullform of cout and clrscr

Answer 1

cout // console output
clrscr(); // clear screen

Answer 2

console output(cout is object which gives output to screen as well as from memory) and clearscreen (so that all screen clears and only relevant things can be shown..)

Answer 3

there are no "full forms" there are only meaningful names.

Answer 4

cout means console output
#include<iostream.h> use this header file

clrscr(); means clear screen
#include<conio.h> use this header file

as well as you can also use getch();
function use for hold the screen when
we run the actual program.