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@verb #1112:"is_float" this none this rxdo #7788
@program #1112:"is_float" this none this
"Usage:  is_float(string)"
"Is string composed of one or more digits possibly preceded by a minus sign either followed by a decimal or by an exponent?"
"Return true or false"
return match(args[1], "^ *[-+]?%(%([0-9]+%.[0-9]*%|[0-9]*%.[0-9]+%)%(e[-+]?[0-9]+%)?%)%|%([0-9]+e[-+]?[0-9]+%) *$")
.

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