Loops Session

Loops

printf("%d",1);   Loop provision
printf("%d",1);
printf("%d",1);
printf("%d",1);
printf("%d",1);

Loop
> While
> for
> do while

WHILE LOOP
==========

while(condition)
{
	while body;
}

a=1;
while(a<=5)
(
)
Infinite Loop. There is no increment.
To run a Loop we need to increase the count each time.

a=1;
while(a<=5)
(
a=a+1;
)

a=1;
while(a<=10)
(
a=a+2;
)   5 Times

a=5;
while(a<=1)
(
a=a-1;
)  0 TIMES

a=5;
while(a>=1)        A= 5 - 0   Big to Small  (-)   (>)
(                  A=0 - 5    Small to Big   (+)   (<)
a=a-1;
)
Loop is otherwise called Iteration.
a(variable) is Iterator.

a=1;
while(a<=5)
{
  printf("%d",1);
  a=a+1;
} O/P : 11111

printf("%d",1);
printf("%d",2);
printf("%d",3);
printf("%d",4);
printf("%d",5);
***************************
a=1;
while(a<=5)
{
  printf("%d",a);
  a=a+1;
} O/P : 12345
******************************
a=5;                              a 5 4 3 2 1
while(a<=5)                         1 2 3 4 5
{
  printf("%d", 6-a );
  a=a-1;
}    O/P :  12345
**************************
a=5;
while(a>=5)
{
  printf("%d",a);
  a=a-1;
}

-----------------------
a=b=1;
while(a)
{
}  Valid
---------------------------------------
a=b=1;
while(a)
{
a=b<=3;
printf("%d %d \n", a, b);
b=b+1;
}
printf("%d %d \n",a+10,b+10);
O/p : 1 1
      1 2
      1 3
      0 4
      10 15
-------------------------------------------
a=b=10;
while (a)
{
a= b < = 13;
printf("%d %d \n",a,b );
b=b+1;
}
printf("%d %d \n",a+10,b+10);
//////////////////////////////////////////////////////
-----------For Loop-----------
for(intialization; Condition; increment or decrement)
{
   for body;
}

*****************************
void main()
{
int a;

for(a=1;a<=3;a=a+1)  a=1 2 3 4
{
printf("a");
}

}   O/P : aaa
*****************************

int a,b;
for(a=1,b=10;a<=b; a=a+1,b=b+1)
{
printf("%d %d ",a,b);
}
printf("%d %d ",a+10,b+10);
O/P : 1 10 2 9 3 8 4 7 5 6 16 15

*******************************
int a,b;
for(a=b=1; a ;b=b+1)
{
   a=b<=3;
printf("%d %d ",a,b);
}
printf("%d %d ",a+10,b+10);

O/P :

*******************************
void main ()
{
for( ; ; )   Valid...
{
printf("Hello");    Infinite times Hello
}
}
Condition Will be true if it is empty
********************************
void main()
{
int a=1;
for( ;a<=3; )
{
printf("%d"a);
a=a+1;
}
}
}