how to correct this error

function [ciphertext] = encrypt(plaintextfile,ciphertextfile,dim)
if nargin < 3 
    encodematrix=[105 18;27 171];
    dim = length(encodematrix);
else
    g = 2*din;
while g~=1

??? Error: File: encrypt.m Line: 7 Column: 1
At least one END is missing: the statement may begin here.

[varmidh]

I have the same problem even though the code editor is green and I have double checked that every if, while, for loop does have a matching end statement.

[Walter Roberson]

varmidh, please post your code.

Answer 1

[per isakson]

See the page "Avoid Mistakes While Editing Code" in the documentation.

The Code Analyzer of the Matlab Editor works in the background and displays a summary in the Message Indicator in upper right corner of the editor pane. It works a bit like the spell checker in a word processor. Try to keep the Message Indicator green and understand that if it is red you have a problem.

Your error message says that "at least one END is missing". Hint: a while-loop must be closed with the keyword, end.

Answer 2

[Walter Roberson]

"if" must be matched with "end". "while" must be matched with "end". The variable "din" (with an N) must be defined before it is used. A value must be assigned to the output variable "ciphertext"