for loop in c

The For Loop

The "for" loop is really nothing new, it is simply a new way of describe the "while" loop. Load
and edit the file named forloop.c for an example of a program with a "for" loop.

Syntax:  for ( [<expr1>] ; [<expr2>] ; [<expr3>] )  <statement>

<statement> is executed repeatedly UNTIL the value of <expr2> is 0.

BEFORE the first iteration, <expr1> is evaluated. This is usually used to
initialize variables for the loop.

AFTER each iteration of the loop, <expr3> is evaluated. This is usually used
to increment a loop counter.
 

Program

main( )
{
int index;
for(index = 0;index < 6;index = index + 1)
printf("The value of the index is %d\n",index);
}

when the above program first  check condition and then loop will continued until the condition will false 

when above program the 

index=0  is initialization of the loop

index<6  is condition of loop

index+1  is the increment of loop

when above program executed until the index value can be 7 and more the program o/p

is

 

output:  The value of the index is 0
The value of the index is 1
The value of the index is 2
The value of the index is 3
The value of the index is 4
The value of the index is 5

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