The condition is evaluated before the body is executed, so it is possible to get zero iterations. Note that, break and continue can be used in while-loops in the same fashion as they are used in for-loops, described above. Write a function that does so, using for-loop, break, and MATLAB’s intrinsic function isprime().Īnswer: function integer = getPrime(upper) Suppose you want to find the largest prime number that is smaller than a given input value by the user.
This is specially useful when you want to ensure if a condition has happened, and if so, then terminate the for-loop.
You can also use break inside a for-loop to get out of it, even before the for-loop finishes the full number of iterations.
You can also iterate in reverse order, > istart = 10 For example consider a script named forLoop.m, for index = istart:stepSize:iendĭisp( ) The statements are the set of programming tasks that have to be repeated. Usually, expression is a vector of the form istart:stepSize:iend where fix((iend-istart)/stepSize+1) gives the number of iterations requested by the user, assuming iend>istart. The general syntax of for-loop is, for variable = expression The for-loop is among the most useful MATLAB constructs. Similar to other programming languages, MATLAB also has built-in tools for iterative tasks in codes. In MATLAB, clear command clears all the variables of the workspace.Many programming algorithms require iteration, that is, the repetitive execution of a block of program statements. MATLAB VIEW – to show whos command executionīefore executing whos command, variables are listed in Workspace as shown belowĪfter executing the whos command, variables name, size, bytes, class, attributes displayed in the command window as shown below MATLAB clear command Whos displays a list of the variables currently in the memory and their sizes together with information about their bytes and class. MATLAB VIEW – to show who command executionīefore executing who command, variables are listed in Workspace as shown belowĪfter executing who command, variables name displayed in the command window as shown below MATLAB whos command Who displays a list of the variables currently in the memory. When these commands typed in the Command Window and the Enter key is pressed, either they provide information, or they perform a task as specified below. MATLAB – Proper commands for managing variablesĬommands like clear, who and whos, that can be used to eliminate variables or to obtain information about variables that have been created. Type the following code in the command window and see the result– Type the following code in the command window and see the result –Īim (1): To define variable x as a matrix and the elements of x are given by: x=(1, 22, 3, 2, 34, 4, 12, 2, 4).ġ2 2 4 MATLAB VIEW – Program (1) and Output (1): Output (1): x = 1 22 3 MATLAB VIEW – Program (1) and Output (1):