assert_istrue

Check that condition is true.

Syntax

  • assert_istrue(x)

  • r = assert_istrue(x)

  • [r, msg] = assert_istrue(x)

  • assert_istrue(x, err_msg)

  • r = assert_istrue(x, err_msg)

  • [r, msg] = assert_istrue(x, err_msg)

Input argument

  • x - a logical value

  • err_msg - a string, the error message to be printed in case of failure (optional).

Output argument

  • res - a logical value

  • msg - a string value, the error message. If x == true, then msg == ''. If x == false, then msg contains the error message.

Description

Raises an error if x is false. Raises an error if x is not a logical.

Examples

assert_istrue(3 == 3)
assert_istrue(3 == 4)
r = assert_istrue(false)
[r, msg] = assert_istrue(false)
[r, msg] = assert_istrue(3 == 4, 'your error message.')

See also

assert_isfalse, assert_checkerror.

History

Author

Allan CORNET

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