Declaration of Variables in MATLAB

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Communication Engineering

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Declaration of Variables in MATLAB

• Here, I will show you that what happens if you have not declared the variables.
• The error is shown in the figure below, when you have not declared the variables.

• I have written an equation having three different variables named as f,t and r without declaring these variables.
• MATLAB has shown an error on the command window as undefined function or variable.
• So the error shown in the above figure shows the desired results can not be obtained without declaring the variables first.
• Now, I am going to declare all the variables first and will then manipulate them.
• The declared variables are shown in the figure below.

• Since I have declared all of the variables now which are being used in the equation.
• So, now I am going to manipulate them and going to observe the results.
• The result of the addition of the two variables, which is stored in the third variable, is shown in the figure below.

• The above figure shows the result of the addition of the two different variables in the form of an equation.
• The result has been obtained because all of the variables has been declared first, i.e. declaration of variables plays a very important role while writing an algorithm to perform any task either simple or complicated.
• You can also see all of the process in the video given below: