CALCULATE THE AREA OF CIRCLE OF RADIUS 2CM USING FORTRAN PROGRAMMING LANGUAGE
PARAMETER (PI = 3.141592653589793)
A = 2*PI*2**2
some dialects of FORTRAN define constants differently.
PARAMETER (PI = 3.141592653589793)
A = 2*PI*2**2
To calculate the area of a circle using Fortran programming language, you can follow these steps:
1. Define a program to calculate the area of a circle.
2. Declare the necessary variables, such as the radius and the area.
3. Prompt the user to enter the radius of the circle.
4. Read the radius input from the user.
5. Calculate the area using the formula: A = π * r^2, where A is the area and r is the radius.
6. Display the calculated area on the screen.
7. End the program.
Here is an example code in Fortran:
```fortran
program CalculateCircleArea
implicit none
real :: radius, area
real, parameter :: PI = 3.14159
! Prompt user to enter the radius
write(*,*) "Enter the radius of the circle (in cm): "
read(*,*) radius
! Calculate the area of the circle
area = PI * radius**2
! Display the result
write(*,*) "The area of the circle is ", area, " cm^2"
end program CalculateCircleArea
```
To compile and run this Fortran program, you can use a compiler such as gfortran. After saving the code into a file called "circle_area.f90", open a terminal and navigate to the directory where the file is located. Then, run the following commands:
```
gfortran circle_area.f90 -o circle_area
./circle_area
```
You will be prompted to enter the radius, and the program will then calculate and display the area of the circle on the screen. In this case, the radius is given as 2 cm. The output will show the calculated area.