For loop in C++

 For loop:

The for is an entery entrolled loop and is used when an action is to be repeated for a predetermined number of times. Similarly When we have executes same line of statement repetitively is done by LOOP.

Syntax:

for(initial value; test; increment)       

{

action1;

}

action2;

Program: Write a program to print 1 to 10 number using for loop .

Code:

#include<iostream>

using namespace std;

int main()

{

int i;

for(i=1;i<=10;i++)

{

printf("%d\n",i);

}

}

OUTPUT:

1

2

3

4

5

6

7

8

9

10

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Program2Write a Program in C++ to Print all natural numbers upto N without using semi-                              colon(;) using for loop.

Code:

#include<iostream>

using namespace std;

int main()

{

int i , no;

cout<<"Enter the number to print ";

cin>>no;

for(i=1;i<=no;i++)

{

if(cout<<i<<"\n")

{}

}

return 0;

}

OUTPUT:

Enter the number to print 5

1

2

3

4

5

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Program: Write a C++ Program to display the cube of the numbers upto a given integer using for                     loop .

Code:

#include<iostream>

using namespace std;

int main()

{

int no,i, cube;

cout<<"Enter number to find cube up to that number ";

cin>>no;

for(i=1;i<=no;i++)

{

cube=i*i*i;

cout<<"\n cube of "<<i<<" is "<<cube;

}

}

OUPUT:

Enter number to find cube up to that number 5

 cube of 1 is 1

 cube of 2 is 8

 cube of 3 is 27

 cube of 4 is 64

 cube of 5 is 125

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Program: Write a program in C++ that takes a number as input and prints its multiplication table upto 10 using for loop.

Code:

#include<iostream>

using namespace std;

int main()

{

int num,i;

cout<<"Enter a number";                   

cin>>num;

for(i=1;i<=10;i++)

{

cout<<num*i;

cout<<"\n";

}

}

OUPUT:

Enter a number19

19

38

57

76

95

114

133

152

171

190

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Program: Write a program in C++ to check given  number is prime or not 

Code:

#include<iostream>

using namespace std;

int main()

{ int i=0,num,count=0;

cout<<"Enter a number: ";

cin>>num;

//cout<<i;

for(i=2;i<num;i++)

{

if(num%i==0)

{

count++;

break;

    }

}

if(count==1)

{

cout<<"The number is not prime ";

}

else 

cout<<"The number is prime";

return 0;

} 

OUTPUT:

Enter a number: 19

The number is prime

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