In MATLAB, a constant is a variable that has a fixed value that cannot be changed during program execution. Constants are declared using the "const" keyword. Here are some examples of how to use constants in MATLAB:
Example 1: Defining a constant for pi
const pi = 3.14159
radius = 5
area = pi * (radius * radius)
In this example, we have defined a constant for pi. We then use this constant in our calculation of the area of a circle.
Example 2: Defining a constant for the speed of light
const c = 299792458 % speed of light in meters per second
distance = 10 % distance in meters
time = distance / c % time it takes light to travel 10 meters
In this example, we have defined a constant for the speed of light. We then use this constant in our calculation of the time it takes light to travel a certain distance.
By using constants, we can make our code more readable, maintainable, and modifiable. If we need to change the value of a constant, we can simply change its value in one place instead of searching for every instance of its value in the code.