First knowledge of C language -- common data types

C What are the common data types in the language ？
char // Character data type
short // Short
int // plastic
long // Long integer
long long // Longer plastic surgery
float // Single-precision floating-point
double // Double precision floating point

1. Why are there so many types ？

		 There are so many types , In fact, it is to express various values in life more abundantly . Different data can be represented by different types .

2. What is the size of each type ？

have access to sizeof Operator to calculate the space occupied by different data types

#include <stdio.h>
int main()
{
    
    printf("%d\n", sizeof(char));
    printf("%d\n", sizeof(short));
    printf("%d\n", sizeof(int));
    printf("%d\n", sizeof(long));
    printf("%d\n", sizeof(long long));
    printf("%d\n", sizeof(float));
    printf("%d\n", sizeof(double));
    printf("%d\n", sizeof(long double));
    return 0; }

3. Use of type