To send a return value, it is required to set the value of each ‘out’ arg. In MATLAB, it is not supported to return values using the return statement.
Hence directly, it returns control to the invoking subroutine or commands prompt. In MATLAB, when the control flow reaches a return statement in a conditional block, it just exits the loop and exits the script or function in which the return command is executed. While using return within conditional blocks, such as if or switch, or within loop control statements, such as, for or while, the programmer needs to be careful. Use of return statement in association with ‘continues’ statement provides flexibility to the program to decide whether to reroute the flow of control or keep it running within the current scope of the code. Makes the execution faster and results in improving the performance. As it reduces the number of instructions to be executed, it also reduces the execution time for the program.
Matlab return code#
As a result, it improves code quality and optimizes the code execution.
Using a return statement prevents the execution of unwanted functionalities once the desired condition is satisfied. Returning control to callfunction() from findfunction() return command when the match is found and make the flow stay within the loop using the command ‘continue’ when the matched element is not found.Ĭase 2: The return and continue statement execution based on finding matched or non-matched element.The program can have the flexibility to decide on which condition the flow of control should be rerouted to its calling sub routine or the command prompt and on which condition will force the flow to stay in the current system. Usage of return and continue statement in a loop %Defining callfunction(), the calling subroutineįunction resultfunc = callfunction(inputval,referenceArray)result=findindex(inputval,referenceArray) if isnan(result)disp('Match is not found.') elsedisp() endendfunctionĬallfunction(-12, )ģ. %Using return statement on achieving the program objectiveįor Index = 1:length(referenceArray) if referenceArray(Index) = inputval return elsedisp('Match not found')endendendfunction %Using return statement for data validation Index = NaN if inputval< 0 returnend
Returning control to callfunction() from findfunction() return command.Performing validation checking on input data of findindex() function.The below code snippet defines a function findindex() within another function callfunction() where the return command is used with 2 purposes: It can be carried out when its parent subroutine triggers the current in the current subroutine or function, and the command ‘return’ is executed. If the program needs to reroute the flow of control to the calling subroutine or the calling function on the occurrence of some specific condition. Redirecting execution flow to the parent (calling) subroutine from the called subroutine finding matching elementĬase 1: The return statement is executed on a negative input being givenĬase 2: The return statement is executed on match to the input data is foundĢ. %Using return statement on achieving the program objective i.e. %Using return statement for data validation %Defining findindex(), the called subroutineįunction Index = findindex(inputval,referenceArray) Returning control to keyboard once the match is found.Performing validation checking on input data.The below code snippet defines a function findindex() where the return command is used with 2 purposes: If a program needs the user to take action on the occurrence of some specific condition, the current subroutine or function can be called directly without being triggered by any parent sub routine, and the flow of control returns to the command prompt or the keyboard when the command ‘return’ is executed. Some of the important use cases are discussed below. It can also be used for data validity checking functionality. Return command is used in different conditions based on the technical requirement of the program. MATLAB redirects the control nothing but to the command prompt when a script or a function contains a return, and it is not being called from any invoking program.įor both cases, the syntax is a single command instruction, i.e., return Use cases for a return statement The return command redirects the control to invoking script or function instead of letting MATLAB execute the rest of the consecutive commands in the called subroutine. Hadoop, Data Science, Statistics & others
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