Daniela Archibong

README.md

@@ -6,12 +6,14 @@ Anyone can create a program that interprets input as code, processes it accordin
 Write a program that will use readline to take user input.
 The input will follow certain rules which is our syntax.
 * Calculator
-  * The input will be similiar to  `x + y`. We can add, subtract, multiply or divide. Determine the 2 numbers, 
-determine the math operator and output the result
+  * The input will be similar to  `x + y`. We can add, subtract, multiply or divide. Determine the 2 numbers, determine the math operator and output the result
+
 * Bool
   * The input will be `X > Y`. We can compare <, >, ===, !==. return `true` or `false`
+
 * Variable
   * The input will be `let whatever = “something”`, if the user then types in the variable name, it should print it back out
+
 * Bonus
   * Combine the functionality so you can assign a bool or number into a variable
 

index.js

@@ -1 +1,122 @@
+const readline = require(`readline`);
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout
+});
+
+//placeholders for user input
+
+let answer = "";
+
+
+function askName(){
+  rl.question(`What is your name? `, name => {
+    name = name.trim();
+    console.log(`Hello, ${name}!`);
+    runCalculator();
+  })
+};
+
+function runCalculator() {
+  rl.question(`What is the value of X? `, inputX => {
+    inputX = Number(inputX);
+    console.log(`Value of X: ${inputX}`);
+    if (isNaN(inputX) === true){
+      console.log('That is not a number. Try again!');
+      runCalculator();
+    } 
+
+    rl.question(`What is the value of Y? `, inputY => {
+      inputY = Number(inputY);
+      console.log(`Value of Y: ${inputY}`);
+      if (isNaN(inputY) === true){
+        console.log('That is not a number. Start Over.');
+        runCalculator();
+      } 
+      rl.question(`Which math operator (+ , - , * or / )? `, doMath => {
+        doMath = doMath.toLowerCase().trim();
+        //Addition
+        if (doMath === "+" || doMath === "add" || doMath === "plus") {
+          doMath = "+";
+          answer = parseInt(inputX) + parseInt(inputY);
+          console.log(`The equation: ${inputX} ${doMath} ${inputY} `);
+          console.log("The answer: " + answer);
+          testTrue();
+        }
+        //Subtraction
+        if (doMath === "-" || doMath === "subtract" || doMath === "minus") {
+          doMath = "-";
+          answer = parseInt(inputX) - parseInt(inputY);
+          console.log(`The equation: ${inputX} ${doMath} ${inputY} `);
+          console.log("The answer: " + answer);
+          testTrue();
+        }
+        //Multiplication
+        if (doMath === "*" || doMath === "x" || doMath === "multiply") {
+          doMath = "*";
+          answer = parseInt(inputX) * parseInt(inputY);
+          console.log(`The equation: ${inputX} ${doMath} ${inputY} `);
+          console.log("The answer: " + answer);
+          testTrue();
+        }
+        //Division
+        if (doMath === "/" || doMath === "%" || doMath === "divide") {
+          doMath = "%";
+          answer = parseInt(inputX) / parseInt(inputY);
+          console.log(`The equation: ${inputX} ${doMath} ${inputY} `);
+          console.log("The answer: " + answer);
+          testTrue();
+        }
+      });
+
+      function testTrue(){
+        rl.question(`Which comparative operator (< , > , === , or !== )? `, compare => {
+            console.log(`Is ${inputX} ${compare} ${inputY} ?`);
+            //Greater Than
+            if (compare === '>'){
+              if (parseInt(inputX) > parseInt(inputY)) {
+                console.log("True");
+              } else {
+                console.log("false");
+              };
+              rl.close();
+            }
+            //Less Than
+            if (compare === "<"){
+              if (parseInt(inputX) < parseInt(inputY)) {
+                console.log("True");
+              } else {
+                console.log("false");
+              } ;
+              rl.close();
+            }
+            //Equal
+            if (compare === "==="){
+              if (parseInt(inputX) === parseInt(inputY)) {
+                console.log("True");
+              } else {
+                console.log("false");
+              } ;
+              rl.close();
+            }
+            //Not Equal
+            if (compare === "!=="){
+              if (parseInt(inputX) !== parseInt(inputY)) {
+                console.log("True");
+              } else {
+                console.log("false");
+              } ;
+              rl.close();
+            }
+    })
+  }
+    });
+  });
+}
+
+
+// the function is called to prompt for the answers to the questions
+askName();
+runCalculator();