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Variables in C Language

Variables :

in C Language Variables is like a Placeholder for a value. Variables works as a Name in C language to store or Hold Value in the refereed location in the Memory. So there is Tones of works Done by Variables Like Holding A Value, Accessing the saved Values, Location Etc, here Data Types Plays A Very Impotent Role In the Value Storage,Value Handing Process.

Data Types in C Language/Programming

Data Type :

Each variables in C has an associated data type which save data for our variables, Also each Data Type required different amount of Memory and has storing Range limits.
Here are some

Examples of C Data Types :

int :

int is a Data Type of C for storing Integer (int) Values Like 1,2,3,4 etc.
Memory 4 Bytes
Range -2,147,483,648 to 2,147,483,647

char :

char is also a Data Type of C for storing Character (char) Values Like a,b,c,d etc.
Memory 1 Bytes
Signed Char Range -128 to 127
Unsigned Char Range 0 to 255

float :

This Data Type of C is used to store decimal numbers (numbers with floating point value) with single precision.
Memory 4 Bytes

double :

This Data Type of C is used to store decimal numbers (numbers with floating point value) with double precision Like 1.1, 1.2, 1.3, 1.4 Etc.
Memory of Double 8 Bytes
Memory of Long Double 8 Bytes.

Use Of %d,%c,%f And %lf

%d,%c,%f And %lf, All are Format Specifiers in C Language.They Used in C Language to tell Compiler To treat Values According To Format Specifier They Specifies Place to Get/Store Data or Display Data.
Like,in this Example we are going to use these Formate Specifiers to print data to Output Screen.

%d Format Specifier :

The %d Format Specifier are used to GetAnd Output The Integer Values Like : 1,2,3,4 ETC.

%c Format Specifier :

The %d Format Specifier are used to GetAnd Output The Character Values Like : a,b,c,d,e ETC.

%lf Format Specifier :

The %d Format Specifier are used to GetAnd Output The Float Values with Decimal Point Like : 1.1,1.2,1.3,1.4 ETC.

C Data Type Example


#include
void main()
{

     int a=1;
     char b='z';
     float c=3.5;
     char d[15]="programminghead";
     printf("a =%d",a);
     printf("\nb =%c",b);
     printf("\nc =%f",c);
     printf("\nd =%s",d);

}

Results

a =1
b =z
c =3.500000
d =programminghead

Example (Explained):

#include<stdio.h> :

#include<stdio.h> is a Header file that includes Slandered (str) Input Output (IO) Library/File. Because All Of the C's In build Functions are declared in <stdio.h> File

main() :

main() (main function) is the entry point of C program. When We Run our C program the execution Control Directly to the main() (main function) and gave us result in output.

printf() :

printf() is also a Function of C. Printf() is used to print “character, string, float, integer,etc” to the output screen.
So what ever we write between printf() inverted commas (" ") that will be printed on the output Screen

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