assert
Ensure that a condition is fulfilled.
Fails with an error if the condition is not fulfilled. Does not produce any output in the document.
Example
#assert(1 < 2)

ParametersParameters are the inputs to a function. They are specified in parentheses after the function name.
Parameters are the inputs to a function. They are specified in parentheses after the function name.
assert()
condition
The condition that must be true for the assertion to pass.