this and functions

eloquentjavascript/functions.js

@@ -19,3 +19,71 @@ const hummus = function (factor) {
     ingredient(0.5, "teaspoon", "cumin");
 };
 hummus(10);
+
+function power(base, exponent){
+    if (exponent === 0) {
+        return 1;
+    } else {
+        return base * power(base, exponent -1);
+    }
+    
+}
+console.log(power(2, 3));
+
+function findSolution(target){
+    function find(current, history){
+        if (current == target){
+            return history;
+        } else if (current > target){
+            return null;
+        } else {
+            return find(current + 5, `(${history} + 5)`) ??
+            find (current * 3, `(${history} * 3)`);
+        }
+    }
+    return find(1, "1");
+}
+console.log(findSolution(24));
+
+function printFarmInventory(cows, chickens) {
+    let cowString = String(cows);
+    while (cowString.length < 3) {
+        cowString = "0" + cowString;
+    }
+    console.log(`${cowString} Cows`);
+    let chickenString = String(chickens);
+    while (chickenString.length < 3){
+        chickenString = "0" + chickenString;
+    }
+    console.log(`${chickenString} Chickens`);
+}
+printFarmInventory(7, 11);
+
+function printZeroPaddedWithLabel(number, label) {
+    let numString = String(number);
+    while (numString.length < 3) {
+        numString = "0" + numString;
+    }
+    console.log(`${numString} ${label}`);
+};
+
+function printFarmInventory_2(cows, chickens, pigs) {
+    printZeroPaddedWithLabel(cows, "Cows");
+    printZeroPaddedWithLabel(chickens, "Chickens");
+    printZeroPaddedWithLabel(pigs, "Pigs");
+}
+printFarmInventory_2(7, 11, 3);
+
+function zeroPad(number, width){
+    let string = String(number);
+    while (string.length < width) {
+        string = "0" + string;
+    }
+    return string;
+}
+function printFarmInventory_3(cows, chickens, pigs) {
+    console.log(`${zeroPad(cows, 3)} Cows`);
+    console.log(`${zeroPad(chickens, 3)} Chickens`);
+    console.log(`${zeroPad(pigs, 3)} Pigs`);
+}
+printFarmInventory_3(7, 16, 3);