script.js

// LAB SCR
function run_lab() {
  // OUPUT VAR
  let output_var = [];

  function cl(str) {
    if (str == null) {
      str = "";
    }
    output_var.push(str);
    console.log(str);
  }

  // 1. Declare and Use Variables
  let studentName = "Carmack Romero";
  let studentAge = 92;
  let isEnrolled = false;
  cl();

  // LOG TO CONSOLE
  cl(`STUDENT NAME[${studentName}]`);
  cl(`STUDENT AGE[${studentAge}]`);
  cl("IS ENROLLED[" + isEnrolled + "]");
  cl();

  // 2. Demonstrate Data Types

  // Create and log examples for all five basic JavaScript data types:
  // String: A text value.
  // Number: An integer or floating-point number.
  // Boolean: true or false.
  // Array: A collection of values (e.g., ["apple", "banana", "cherry"]).
  // Object: An entity with properties (e.g., { firstName: "John", lastName: "Doe" }).

  let strVar = "I'm a string of characters!";
  let numVar = -999;
  let booleanVar = false;
  let arrayVar = ["This", "sure", "is", "a", "cool", "array", "!"];
  let objVar = {
    whatAmI: "an object",
    isCool: true,
  };

  // LOG TO CONSOLE
  cl("WHAT IS THIS strVar? [" + strVar + "]");
  cl("IS THIS numVar[" + numVar + "] BIGGER THAN ZERO?(" + (numVar > 0) + ")");
  cl(
    "IS THIS boolVar[" + booleanVar + "] FALSE?(" + (booleanVar == false) + ")"
  );

  cl(
    "WHAT IS THIS arrayVar[" +
      arrayVar +
      '] AS A STRING? "' +
      arrayVar.join(" ") +
      '")'
  );
  cl();

  cl("THIS OBJECT[" + objVar + "]...");
  cl("WHAT IS THIS OBJECT[" + objVar.whatAmI + "]");
  cl("IS THIS OBJECT COOL?[" + objVar.isCool + "]");
  cl();

  // 3. Use Basic Operators
  // Perform and log operations using different types of operators:

  // Arithmetic Operators: Addition (+), Subtraction (-), Multiplication (*), and Division (/).

  let opValA = 1000.0;
  let opValB = -250 + Math.random() * 500;
  opValB = Math.round(opValB);

  cl("The value of opValA is [" + opValA + "]");
  cl("The value of opValB is [" + opValB + "]");

  let opValSum = opValA + opValB;
  let opValSub = opValA - opValB;
  let opValMul = opValA * opValB;
  let opValDiv = opValA / opValB;

  cl("(" + opValA + " + " + opValB + " = " + opValSum + ")");
  cl("(" + opValA + " - " + opValB + " = " + opValSub + ")");
  cl("(" + opValA + " * " + opValB + " = " + opValMul + ")");
  cl("(" + opValA + " / " + opValB + " = " + Math.round(opValDiv) + ") * ROUNDED");
  cl();

  // Comparison Operators: Greater than (>), Less than (<), Equal to (===), and Not equal (!==).
  cl("(" + opValA + " > " + opValB + " is " + (opValA > opValB) + ")");
  cl("(" + opValA + " < " + opValB + " is " + (opValA < opValB) + ")");
  cl("(" + opValA + " === " + opValB + " is " + (opValA === opValB) + ")");
  cl("(" + opValA + " !== " + opValB + " is " + (opValA !== opValB) + ")");
  cl();

  // Logical Operators: AND (&&), OR (||), and NOT (!).

  let opValC = -1000 + Math.random() * 2000;
  opValC = Math.round(opValC * 10) / 10;
  cl("The value of opValC is [" + opValC + "]");

  if (opValA > 0.0 && opValC > 0.0) {
    cl(
      "BOTH A[" + opValA + "] and C[" + opValC + "] VALUES ARE MORE THAN ZERO"
    );
  } else {
    cl("EITHER A[" + opValA + "] or C[" + opValC + "] ISN'T MORE THAN ZERO");
  }

  if (opValA > 0.0 || opValC > 0.0) {
    cl("EITHER A[" + opValA + "] and C[" + opValC + "] IS MORE THAN ZERO");
  } else {
    cl("NEITHER A[" + opValA + "] or C[" + opValC + "] IS MORE THAN ZERO");
  }
  cl();

  let opValD = Math.random() > 0.5;

  cl("The value of opValD is [" + opValD + "]");
  cl("The value of !opValD is [" + !opValD + "]");
  cl();

  // RETURN OUTPUT VAR TO PAGE
  console.log("OUTPUT VAR LENGTH(" + output_var.length + ")");

  let ret_str = output_var.join("\n");

  return ret_str;
}

// QUICK & EASY MAKE AVAIL TO THE INDEX.HTML
window.run_lab = run_lab;