C++ programming tutorial 3

 Control statement in c++ programming -

1. For loop statement in c++ programming - 

In this loops we run a single part of code many times this used for simple our programming and in less code , time work done is same .

Syntax -

for(int i =0; i< x ; i++){

.....

}

Code - 

// For loop in c++ language 

#include<iostream>

using namespace std;

int main()

{

    int i , a;

    cout<<"Loop was start Below "<<endl;

    cout<<"Enter the value of a:"<<endl;

    cin>>a;

    for(i=0;i<=a;i++)

    {

        cout<< "this is a number count :"<< i<<endl;

    }

    return 0;

}

Output -

Loop was start Below 

Enter the value of a:

12

this is a number count :0

this is a number count :1

this is a number count :2

this is a number count :3

this is a number count :4

this is a number count :5

this is a number count :6

this is a number count :7

this is a number count :8

this is a number count :10

this is a number count :11

this is a number count :12

2. Switch statement in C++ programming -

In switch statement we use it like options for user we enter multiple or different condition like addition of two variable , multiplication of two variable etc and user have choice in this option and they set it .

Syntax -

switch (expression)
{
case /* constant-expression */:
/* code */
break;

default:
break;
}

Code -

// Switch statement 

#include<iostream>

using namespace std;

int main()

{

    int option,a,b,c,d;

    

    cout<<"This are the option you have choose : "<<endl;

    cout<<"1. Addition of variable"<<endl;

    cout<<"2. Subtraction of variable"<<endl;

    cout<<"3. Multiplication of variable"<<endl;

    cout<<"4. Division of variable"<<endl<<endl;

    

    cout<<"Enter the option :"<<endl;

    cin>>option;

    cout<<"Enter the two variable :"<<endl;

    cout<<"Variable A :"<<endl;

    cin>>a;

    cout<<"Variable B :"<<endl;

    cin>>b;

    switch (option)

    {

    case 1:

        cout<<"Addition of the Variable is :"<<endl;

        c = a + b;

        cout<<c;

        break;

    case 2:

        cout<<"Subtraction of the Variable is :"<<endl;

        c = a - b;

        cout<<c;

        break;

    case 3:

        cout<<"Multiplication of the Variable is :"<<endl;

        c = a * b;

        cout<<c;

        break;

    case 4:

        cout<<"Division of the Variable is :"<<endl;

        d = a / b;;

        cout<<d;

        break;

    

    default:

        cout<<"ENTER VALUE IS INVALID SO REFRESH";

    }

}

Output -

This are the option you have choose : 

1. Addition of variable

2. Subtraction of variable

3. Multiplication of variable

4. Division of variable

Enter the option :

1

Enter the two variable :

Variable A :

12

Variable B :

11212

Addition of the Variable is :

11224

3. Break statement in c++ programming -

In break statement it stop the follow of any loops let say for loop is running then it will stop the program if given condition is matched.

Syntax -

Break;

Code -

// Break statement in c++ programming 

#include<iostream>

using namespace std;

int main()

{

    int i , a;

    cout<<"Loop was start Below "<<endl;

    cout<<"Enter the value of a:"<<endl;

    cin>>a;

    for(i=0;i<=a;i++)

    {

        if(i==10)

        {

            break;

        }

        cout<< "this is a number count :"<< i<<endl;

    }

    return 0;

}

Output -

Loop was start Below 

Enter the value of a:

12

this is a number count :0

this is a number count :1

this is a number count :2

this is a number count :3

this is a number count :4

this is a number count :5

this is a number count :6

this is a number count :7

this is a number count :8

this is a number count :9

4. Continue statement in c++ programming -

In this it is opposite to the break statement break stop the loop but continue statement skip the condition and continue it .

Syntax -

continue;

Code -

// Continue statement in c++ programming 

#include<iostream>

using namespace std;

int main()

{

    int i , a;

    cout<<"Loop was start Below "<<endl;

    cout<<"Enter the value of a:"<<endl;

    cin>>a;

    for(i=0;i<=a;i++)

    {

        if(i==10)

        {

            continue;

        }

        cout<< "this is a number count :"<< i<<endl;

    }

    return 0;

}

Output -

Loop was start Below 

Enter the value of a:

12

this is a number count :0

this is a number count :1

this is a number count :2

this is a number count :3

this is a number count :4

this is a number count :5

this is a number count :6

this is a number count :7

this is a number count :8

this is a number count :9

this is a number count :11

this is a number count :12