Please help me to understand this topic i cant understand by reading

Answer 1

it is a simple explanation :

in c++ we have four types of data.
and we use them to declare variables .

first is integer it is for numbers.
keyword : int
Ex: int x=5;

second is character it is for letter .
key word: char
Ex: char x='a';

if you want more than one letter in charater data type you can use []
Ex: char x[]="welcome";

remember this ' ' for one letter , however this " "for a sentence.

third is float it is for numbers that have decimal as (12.3)
key word : float
Ex:float x=3.5;

fourth is void . and it means nothing , we can use it for speacial functions.
keyword : void
Ex:void show(){
cout<<"welcome";
}

if you have any dout ask ...

Answer 2

all data types? O o

Answer 3

data types used by the compile4 to determine the sIze of the variable to reserve in memory and the available operations to be made against this variable