Operators

Every programmers first studied this operators only. When we were studying we might n't learned well.

Operators are used to make the efficiency of code.

(+) and (-) operator

Everyone knows the + and - operators. But we can use these operators for swap two numbers without any variable.

Ex: 

   int a = 6;
   int b = 5;

  a=a+b;
  b=a-b;
  a=a-b;

printf("%d,%d",a,b);


As well as we can do multiplication and division by using + and - operators. 

(/)  operator 

By using this operator, we can split the integer and get right side part.
just like substring of number.

Ex:

int a = 1234;

i wanna b as 12;

so b = a/100;

u can get b as 12;

like this u can get 123 by using /10 
and u can get 1 by using /1000


(%) operator

This is one special operators of all other operators. 

I) get substring from left side of interger

Ex:

  int a = 1234;

  i wanna b as 34 

  b = a % 100;

II) Circular array 

  you can form a circular array by using % operator.

  Ex:

   output :

           vicky
           ickyv
           ckyvi
           kyvic
           yvick
           vicky

char str[] = "vicky" ;
    n=5;
    for(i=0;i<=n;i++){
      for(j=i;j<n+i;j++){
            printf("%c",str[j%n]);
        }
         printf("\n");
     }


iii) sum of digits (output single digits)

You can get sum of digit by using %9 

Ex:

 a = 123;

b = a % 9;

 output is 6 (1+2+3)

if your n % 9 value is 0 then output is 9

ex:

   a = 450;

   b = a % 9  

 if ( b == 0)

   printf("sum of digit is 9');

 else 

  printf("sum of digit is %d',b);
  
   

suppose a is 0 then you need to add another one conditions.



IV) Odd Nubmer

  You can find odd number by using %2 operator