Loop control structure in C++

Repeatation of statements or code is called a loop, when there is need to repeat some statements or code in the program loop is used.

for loop

#include<iostream>
#include<conio.h>
using namespace std; int main(){ int n; for(n=1; n<=10; n=n+1){ cout<<n; } getch(); return 0; }

while loop

#include<iostream>
#include<conio.h>
using namespace std; int main(){ int n; n=1; while(n<=10){ cout<<n; n=n+1; } getch(); return 0; }

do while loop

#include<iostream>
#include<conio.h>
using namespace std; int main(){ int n; n=1; do{ cout<<n<<endl; n=n+1; } while(n<=10); getch(); return 0; }

Nested loop

#include<iostream>
#include<conio.h>
using namespace stdl int main(){ int row, col; for(row=1; row<=3; row=row+1){ for(col=1; col<=3; col=col+1){ cout<<"*"; } cout<<endl; } getch(); return 0; }
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