Arithmetic in NCL › Real Number Arithmetic › Comparisons With Real Numbers

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Comparisons With Real Numbers

You must use &CONTROL REAL to switch to real number operation if you want to perform comparisons of real numbers. This is because the &IF statement does not know implicitly whether a variable containing a value such as:

+.986000000000000E+05

is a real number in scientific notation or simply a character string that starts with a plus sign.