Learn C Programming in 3 days ( First C program)

How to create variables in C Program

Before proceeding, we should know some rules to create a variables

Not start with number ----- 2cat

Not contain arithmetic operators -----A+B  

Not contain punctuation -------- %#@

Not contain any spaces ------- no book

Not contain any of c keyword -----  static

How to type C variable (syntax)

data-type variable name;

For multiple variable (syntax)

data-type variable 1, variable 2, variable 3;

Data types

char --- hold one character,a single byte----- A

int----- integer whole number----- 2, 3, 4, 5

float------ upto 6 decimal place, floating point number------4.3455, 5.345678 

double------ floating point number, upto 10 decimal place------- 5.1234567784,0.0123456355

How to write variable in a program 

#include<iostream.h>

#inlcude<stdio.h>

int main()

{

int no1,no2;                                 /* create variable no1, no2 in int, character in char and 

char character;                                    decimal in float */

float decimal=9.2;                   

printf("variables no1, no2, character, decimal are created");

getchar();

return 0;

}