Scilab Home page | Wiki | Bug tracker | Forge | Mailing list archives | ATOMS | File exchange
Please login or create an account
Change language to: Français - Português - 日本語 - Русский

Please note that the recommended version of Scilab is 6.1.1. This page might be outdated.
See the recommended documentation of this function

Scilab help >> Development tools > Assert > assert_checktrue


Check that condition is true.

Calling Sequence

flag = assert_checktrue ( condition )
flag = assert_checktrue ( condition )
[flag,errmsg] = assert_checktrue ( condition )



a matrix of booleans

flag :

a 1-by-1 matrix of boolean, %t if condition is true, %f if not

errmsg :

a 1-by-1 matrix of strings, the error message. If flag==%t, then errormsg=="". If flag==%f, then errmsg contains the error message.


Performs silently if all entries in condition are true.

Generates an error if any entry in the condition matrix is false. Generates an error if condition is not a boolean.

If any entry in condition is false,

  • if the errmsg output variable is not used, an error is generated,

  • if the errmsg output variable is used, no error is generated.


// Tests which pass
assert_checktrue ( %t );
flag = assert_checktrue ( %t )
[flag,errmsg] = assert_checktrue ( %t )
[flag,errmsg] = assert_checktrue ( [%t %t] );

// Tests which fail
assert_checktrue ( [%t %f] );
flag = assert_checktrue ( [%t %f] )
// No error generated
[flag,errmsg] = assert_checktrue ( [%t %f] )

// Wrong calls
assert_checktrue ( "a" )


5.4.0 Function introduced
Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Tue Apr 02 17:36:24 CEST 2013