type formats c code example

Example 1: what are format specifiers

it is used during taking input and out put

Int ("%d"): 
Long ("%ld"):
Char ("%c"): 
Float ("%f"): 
Double ("%lf")

example:

char ch = 'd';
double d = 234.432;
printf("%c %lf", ch, d);

char ch;
double d;
scanf("%c %lf", &ch, &d);

Example 2: what is a long long int in c

#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>

#define FailedToEducate    101
#define Success            400

int main(void) {
	/* 
    	A long int is:
        	32-bit compiler: 
            	MIN: -2,147,483,648
            	MAX: 2,147,483,647
                unsigned MAX: 4,294,967,295
            64-bit compiler: 
            	MIN: -9,223,372,036,854,775,808
            	MAX: 9,223,372,036,854,775,807
                unsigned MAX: 18,446,744,073,709,551,615
        Therefore...a long int will either be
        -2,147,483,648 and 2,147,483,647 for a 32-bit compiler
        or -9,223,372,036,854,775,808 and 
        9,223,372,036,854,775,807 for a 64-bit compiler, 
        whilst a long long int will just be 
        -9,223,372,036,854,775,808 and 
        9,223,372,036,854,775,807
        
        I hope this made sense!
    */
  
  	bool userUnderstands=true;
  
  	if(userUnderstands) {
    	exit(Success);
    } else {
    	exit(FailedToEducate);
    }
}