# Program to find the area of the parallelogram in C++

In this c++ program, we will calculate the area of the parallelogram. Before going to the program let us know what is a parallelogram. A parallelogram is a four-sided quadrilateral with both the opposite sides to parallel to each other and equal. So let’s start learning how to find the area of a parallelogram in C++. To calculate the area of the parallelogram we need the length of base and height. From the figure, we can see AB||CD and AC|| BD. Consider CD as the base then height is the perpendicular distance between the base and it’s opposite side. Here AE is the height of the parallelogram.

FORMULA FOR AREA OF THE PARALLELOGRAM:

Area of the parallelogram=base * height.

From the figure CD i.e.’b’ is the base and  AE i.e, ‘h’ is the height of the parallelogram.

Area=b*h.

## C++ program to find area of a parallelogram

There are 2 ways to initialise the variables in the program.

Compile time and Run time

Syntax for compile time initialisation:

float base=13.5;

float height=12.7;

float area=base * height;

Source code:

```int main()
{
float base=13.5;
float height=12.7;
float area =base * height;
cout<<"area of the parallelogram is "<<area;
return 0;
}

```

Output:

```area of the parallelogram is  171.450000.

```

Syntax for run time initialisation:

float base,height,area;

cin>>base>>height;

area=base*height;

Source code:

```int main()
{
float base,height,area;
cout<<"enter base value:";
cin>>base;
cout<<"\n enter height value:";
cin>>height;
area=base*height;
cout<<"\n area of parallelogram is "<<area;
return 0;
}

```

Output:

```enter base value:13.5
enter height value:12.7
area of parallelogram is 171.45000.```