persistent

Persistent variable.

📝Syntax

persistent variable_name
persistent('variable_name')
persistent  variable_name1, ...,  variable_nameN

📥Input Arguments

Parameter	Description
variable_name	a string: variable name.

📄Description

persistent defines a variable defined by his name variable_name as persistent in a function.

Before to use a persistent variable, it is necessary to initializ value.

💡Examples

function to define:

function r = test_persistent_function()
 persistent calls;
 if isempty(calls)
    calls = 0;
 end 
 disp(['nb calls to test_persistent_function: ', int2str(calls)]);
 r= calls;
 calls = calls + 1;
end

calls test_persistent_function

for i = 1:30
  r = test_persistent_function();
end

🔗See Also

clear who global

🕔Version History

Version	Description
1.0.0	initial version

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