format specifiers, constants, escape, comments

 # include <stdio.h>

// # define b=4.555

int main()

{

    int a=6;

    float b=4.555;

    // float b=4.0;can't be true because b is a constant & b=4.555

    // format specifier tells our compilor that what type is the formet of our

input or output variable,

    // it tells our compilor what type of varible we are using as input and output.

    // printf("%N.nDATA_type_symbol",identity like:_a,b...)

    // here N is the total space we want to alot for the corresponing variable

identity.

    // and n dikhta he ki decimal ke bad kitna space create karna he.

    // sign of N, if the sign is positive then space aage dena he & if negetive

then piche space dena he.

    // importet formet specifiers are %c:_character, %d:_integer,

%f:_float(floating number), %s:_string

    // less importent are %lf:_double integer(combination of integer+float),

%i:_unsigned integer, %l:_long integer

   

    // constants are tokens we can't change in a c programme like :_0,13, code

with harry,hemansh etc.

    // there are two way to define a constant

    // const keyword

    // #define (preprocessor)

    // escape sequance :_ "string litteral\n" here \n is escape sequance

    // it doesn't represents itself when used.

    // \n is used to move to the next line.

    // e.s always starts with a "\".

    // commant ye jo upar sab bate as notes likhi he yahi commants he.

represented by "//"

    // commants ko preprocessing me hi compilor hata deta he.

    // "/*" &"*/" ae multiline comments to comment out multiple lines.

   

    printf ("my backslash is \n ");

    printf ("my backslash is \\n ");

   

    printf("tab character\t\t");

    // to create a tab space in output

    printf("tab sound \a");

    printf("%f\n", b);

    printf("%5d\n",a);

    return 0 ;

}