While loop will check the condition first and process again and again until the condition failed. Syntax: Example 1: Example 2: Example 3: Example 4: Example 5: Example 6: 5.1.While loop
while (condition)
{
statement;
increment / decrement;
}
#include<iostream.h>
#include<conio.h>
void main()
{
int i=1;
while(i<=100)
{
cout<<"I: "<<i<<endl;
i++;
}
getch();
}
#include<iostream.h>
#include<conio.h>
void main()
{
int i=1,n,sum=0;
cout<<"Enter N: "; cin>>n;
while(i<=n)
{
sum+=i;
cout<<i<<"+";
i++;
}
cout<<"\b="<<sum;
getch();
}
#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
int i,n;
long sum=0;
char sym=253;
cout<<"Enter N: "; cin>>n;
i=n;
while(i>0)
{
sum+=pow(i,2);
cout<<i<<sym<<"+";
i--;
}
cout<<"\b="<<sum;
getch();
}
#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
int ascii=1;
char sym;
while(ascii<=255)
{
sym=ascii;
cout<<ascii<<"="<<sym<<endl;
ascii++;
}
getch();
}
#include<iostream.h>
#include<conio.h>
void main()
{
int i=1,n;
cout<<"Enter N: "; cin>>n;
while(i<=10)
{
cout<<n<<" * "<<i<<" = "<<n*i<<endl;
i++;
}
getch();
}
#include<iostream.h>
#include<conio.h>
void main()
{
char ch;
int a=97,z=122;
while(a<=z)
{
cout<<(char)a<<",";
a++;
}
getch();
}