problem with if function ( Error using < Not enough input arguments.)

i have error with line 71 and code attached

Answer 1

[KALYAN ACHARJYA]

0.0677*rec*prc*dti/lt;
%..................^

Define lt

[Jan]

+1. Exactly. As long as lt is not defined as a variable, it is the lowerthan operator.

[KALYAN ACHARJYA]

Thank you sir @Jan

[Mohammed Bakr]

thank you