3.4 Truthy created by smillaraaq - https://repl.it/GxZN/6

3.4 Truthy.js

function isTruthy(arg){
  var theType= typeof arg;
  var theBool= !!arg; //the original bool of the param
  var theMessage= "";
  console.log(theType+" "+theBool);
  if(theType==="undefined"){
    theMessage= theType+" is falsey";
  }else if(theType==="null"){
    theMessage= "The "+theType+" value is falsey";
  }else if(theType==="boolean"){
    var theBoolMessage=theBool?"truthy":"falsey";
    theMessage= "The "+theType+" value"+theBool+" is "+ theBoolMessage;
  }else if(theType==="number"){
    if(theBool){
      theMessage= "The "+theType+" "+arg+" is truthy";
    }else{
      theMessage= "The "+theType+" "+arg+" is falsey (the only falsey number)";
    }
  }else if(theType==="string"){
    if(theBool){
      theMessage= "The "+theType+" is "+ theBoolMessage;
    }else{
      theMessage= "The empty "+theType+" is falsey (the only falsey string)";
    }
  }else{
    theMessage="do nothing";
  }
  console.log(theMessage);
}
isTruthy(0);