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_scienceStatisticStringIsNegative

Retrieve if a string is a negative or positive number. Strings must be numbers otherwise nil will be returned.

Prototype :

fun [S] I

• S : a string number.

Return : I 1 if negative, 0 if positive or nil if error

See also :

Example :

fun main ()=
	_showconsole;
	_fooS _scienceStatisticStringIsNegative "2136501";	// 0
	_fooS _scienceStatisticStringIsNegative "-520258";	// 1
	_fooS _scienceStatisticStringIsNegative "21A6501";	// nil (A)
	0;;

Note :