chapter 5 excercises.js

// chapter 5 excercises

//example 1
let engineIndicatorLight = ('red blinking');
let spaceSuitsOn = ("true");
let shuttleCabinReady = ('true');
let crewStatus = (' spaceSuitsOn && shuttleCabinReady ');
let computerStatusCode = (200);
let shuttleSpeed = (15000);

// example 2

if (engineIndicatorLight === "green") {
    console.log("engines have started");
 } else if (engineIndicatorLight === "green blinking") {
    console.log("engines are preparing to start");
 } else {
    console.log("engines are off");
 }

// example 3a

 if (crewStatus === true) {
    console.log("Crew Ready");
 } else { 
    console.log ('Crew Not Ready');
 }
 if (crewStatus) {
    console.log("Crew Ready");
  } else {
    console.log("Crew Not Ready");
  }

  // example 3b

  if (computerStatusCode == 200 ) {
  console.log('Please stand by. Computer is rebooting');
  } else if (computerStatusCode == 400) {
    console.log('Success! Computer online');
  } else {
    console.log('ALERT: Computer offline!');
  }

  // example 3c

  if (shuttleSpeed > 17500 ) {
    console.log('ALERT:Cannot maintain orbit!');
} else if (shuttleSpeed < 8000) {
    console.log('Success! Computer online.');
} else {
    console.log('Stable speed');
}

// example 4

if (crewStatus && computerStatusCode === 200 && spaceSuitsOn) {
    console.log("all systems go");
 } else {
    console.log("WARNING. Not ready");
 }

 if (!crewStatus || computerStatusCode !== 200 || !spaceSuitsOn) {
    console.log("WARNING. Not ready");
 } else {
    console.log("all systems go");
 }

 // example 5
 
 let fuelLevel = (20000);
 let engineTemperature = (2500);

 if (fuelLevel < 1000 || engineTemperature > 3500 || engineIndicatorLight === "red blinking"){
   console.log("ENGINE FAILURE IMMINENT!");
 } else if (fuelLevel <= 5000 || engineTemperature > 2500){
   console.log("Check fuel level. Engines running hot.");
 } else if (fuelLevel > 20000 && engineTemperature <= 2500){
   console.log("Full tank. Engines good.");
 } else if (fuelLevel > 10000 && engineTemperature <= 2500){
   console.log("Fuel level above 50%. Engines good.");
 } else if (fuelLevel > 5000 && engineTemperature <= 2500){
   console.log("Fuel level above 25%. Engines good.");
 } else {
   console.log("Fuel and engine status pending...");
 }

 // example 6

 let commandOverride = (true || false);

 

 if (fuelLevel > 20000 && engineIndicatorLight !== "red blinking" || commandOverride == true); {
   console.log ('Cleared to launch');
 } else {
   console.log('Launch scrubbed');
 }