for-loop

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For statement

For statement is used to execute a statement or a group of statement for a known number of times.

 the general form
for(control-variable;condition;increment/decrement)
{
body of the loop
}
next statement;

If the value of the condition is true then the body of the loop will be executed, then the value of the control-variable will be incremented or decremented.when the conditionis false then the control is transferred to the next statement



Block diagram of for-loop







Example program

 #include<stdio.h>
#include<conio.h>

 void main()
{
int i,sum=0;
clrscr();
for(i=1;i<=10;i++)
{
sum=sum+1;
}
printf("sum=%d",sum);
getch();
}

Switch statement 

switch statement is an extension of if...else statement.This permits any number of branches.
the General fornm is 
switch(expression)
{
case 1
statement block-1;

break;
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