From 616a134808d7c88857dd7faa17a9e3eba2ba5f13 Mon Sep 17 00:00:00 2001
From: AlexJora <jora.catalinaa@gmail.com>
Date: Thu, 14 Jul 2022 20:24:19 +0200
Subject: [PATCH] exercises

---
 1-exercises/A-undefined/exercise.js             |  7 +++++--
 1-exercises/B-while-loop/exercise.js            |  8 +++++++-
 1-exercises/C-while-loop-with-array/exercise.js |  8 +++++++-
 1-exercises/D-do-while/exercise.js              |  5 ++++-
 1-exercises/E-for-loop/exercise1.js             |  6 +++---
 1-exercises/E-for-loop/exercise2.js             |  4 +++-
 1-exercises/F-for-of-loop/exercise.js           | 11 +++++++++++
 2-mandatory/2-retrying-random-numbers.js        |  7 ++++++-
 8 files changed, 46 insertions(+), 10 deletions(-)

diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
index 0acfc78d..980c203c 100644
--- a/1-exercises/A-undefined/exercise.js
+++ b/1-exercises/A-undefined/exercise.js
@@ -12,6 +12,7 @@
 // Example 1
 let a;
 console.log(a);
+// variable a doesn't have assigned a value;
 
 
 // Example 2
@@ -21,7 +22,7 @@ function sayHello() {
 
 let hello = sayHello();
 console.log(hello);
-
+// function sayHello doesn't have return;
 
 // Example 3
 function sayHelloToUser(user) {
@@ -29,8 +30,10 @@ function sayHelloToUser(user) {
 }
 
 sayHelloToUser();
+// function sayHelloTo User doesn't have a argument for user;
 
 
 // Example 4
-let arr = [1,2,3];
+let arr = [1, 2, 3];
 console.log(arr[3]);
+//array has just 3 elements and console.log is asking 4-th element;
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
index b459888f..de272d3a 100644
--- a/1-exercises/B-while-loop/exercise.js
+++ b/1-exercises/B-while-loop/exercise.js
@@ -6,7 +6,13 @@
 */
 
 function evenNumbers(n) {
-    // TODO
+    let arr = [];
+    let i = 0;
+    while (arr.length < n) {
+        arr.push(i);
+        i++;
+    }
+    return arr.join(',');
 }
 
 evenNumbers(3); // should output 0,2,4
diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
index d584cd75..3190267d 100644
--- a/1-exercises/C-while-loop-with-array/exercise.js
+++ b/1-exercises/C-while-loop-with-array/exercise.js
@@ -17,7 +17,13 @@ const BIRTHDAYS = [
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+    let i = 0;
+    while (i < BIRTHDAYS.length) {
+        i++;
+        if (BIRTHDAYS[i].includes('July')) {
+            return BIRTHDAYS[i];
+        }
+    }
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
index f10d0764..77062d2e 100644
--- a/1-exercises/D-do-while/exercise.js
+++ b/1-exercises/D-do-while/exercise.js
@@ -7,7 +7,10 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+    let i = 0;
+    let sum = 0;
+    do { sum += i * 2; i++; } while (i < n);
+    return sum;
 }
 
 console.log(evenNumbersSum(3)); // should output 6
diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
index db5fac64..1126b3ce 100644
--- a/1-exercises/E-for-loop/exercise1.js
+++ b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,9 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
-while(i < 26) {
+
+while (let i = 0; i < 26; i++) {
     console.log(String.fromCharCode(97 + i));
-    i++;
+
 }
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
index 081002b2..53be5bab 100644
--- a/1-exercises/E-for-loop/exercise2.js
+++ b/1-exercises/E-for-loop/exercise2.js
@@ -26,7 +26,9 @@ const AGES = [
     49
 ];
 
-// TODO - Write for loop code here
+for (let i = 0; i < 5; i++) {
+    console.log(`${WRITERS[i]} is ${AGES[i]} years old`);
+}
 
 /*
 The output should look something like this:
diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
index 65585c6a..d906bd71 100644
--- a/1-exercises/F-for-of-loop/exercise.js
+++ b/1-exercises/F-for-of-loop/exercise.js
@@ -10,7 +10,18 @@ let tubeStations = [
     "Oxford Street",
     "Tottenham Court Road"
 ];
+let newStr = '';
+for (let i of tubeStations) {
+    newStr += i;
+    console.log(i);
+}
 
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+let otherStr = '';
+for (let i of str) {
+    otherStr += i;
+    console.log(i.toUpperCase());
+}
+
diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
index 10aab37d..9f6a6049 100644
--- a/2-mandatory/2-retrying-random-numbers.js
+++ b/2-mandatory/2-retrying-random-numbers.js
@@ -10,7 +10,12 @@ function generateRandomNumber() {
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+    let number;
+    do {
+        number = generateRandomNumber();
+    } while (number < 51);
+    return number
+
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */