array in fortran,

Fortran Arrays

In Fortran, arrays are a fundamental data structure used to store and manipulate collections of elements of the same type. Arrays in Fortran can have one or more dimensions, allowing for the representation of matrices, vectors, and higher-dimensional structures.

To declare an array in Fortran, you need to specify the type of the elements, the dimensions of the array, and an optional name. Here's the general syntax for declaring a one-dimensional array:

type, dimension(dim1) :: array_name

Here, type represents the data type of the elements in the array, dim1 represents the size of the array along the first dimension, and array_name is the name given to the array.

For example, to declare a one-dimensional array of integers with 10 elements, you would use the following code:

integer, dimension(10) :: my_array

You can also declare arrays with multiple dimensions by specifying the size of each dimension separated by commas. For example, to declare a two-dimensional array of real numbers with dimensions 3x4, you would use the following code:

real, dimension(3, 4) :: my_array

To access individual elements of an array, you use indexing. In Fortran, array indexing starts from 1. For example, to access the element at the second row and third column of a two-dimensional array my_array, you would use the following code:

element = my_array(2, 3)

You can also assign values to array elements using indexing. For example, to assign the value 10 to the element at the first row and second column of my_array, you would use the following code:

my_array(1, 2) = 10

Arrays in Fortran can be used in various ways, such as performing mathematical operations, passing arrays to subroutines, and using array intrinsic functions for array manipulation.

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