Getting Global Variable Value

[an93]

global.set('TRIGGER',msg.payload);

var res = global.get('LENGTH');
var res1 = global.get('CABLE_DESCRIPTION');
var res2 = global.get('FAULT_STRING');
var trig = global.get('TRIGGER')

if(trig===false)
{

msg.payload = res;
}
else{
return msg;
}

res is float which should "var" as datatype
res 1 and 2 are strings for which i get your point about my datatype being wrong