How to set flags in MATLAB?

How to set flags in MATLAB ,,

    flag1=0;
    Do this; 

    flag2=1; 
    Do this;

[Jan]

The question is not clear yet. The shown code runs without problems, but I guess you want to get a specific behavior but did not explain this.

Answer 1

[Muruganandham Subramanian]

Do this, by if() operation

e.g.

if a==0  
%do this
else if a==1
%do this
end

[Arun Badigannavar]

this is common for loop,,but i want to control it from gui ,by setting a flag

Answer 2

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F