Glasgow Class 6 - Diana Savchuk - JS-1 - Week 3

1-exercises/A-undefined/exercise.js

@@ -11,7 +11,7 @@
 
 // Example 1
 let a;
-console.log(a);
+console.log(a); //value is not asigned
 
 
 // Example 2
@@ -20,17 +20,17 @@ function sayHello() {
 }
 
 let hello = sayHello();
-console.log(hello);
+console.log(hello); //sayHello() function does not have a return statement
 
 
 // Example 3
 function sayHelloToUser(user) {
     console.log(`Hello ${user}`);
 }
 
-sayHelloToUser();
+sayHelloToUser(); //sayHelloToUser() function is not given a value when the function is called
 
 
 // Example 4
 let arr = [1,2,3];
-console.log(arr[3]);
+console.log(arr[3]); //array contains only 3 elements and indices like 0,1,2 when we write arr[3] it means that we whant to reach the element number 4 which does not exist here.

1-exercises/B-array-literals/exercise.js

@@ -4,8 +4,8 @@
   Declare some variables assigned to arrays of values
 */
 
-let numbers = []; // add numbers from 1 to 10 into this array
-let mentors; // Create an array with the names of the mentors: Daniel, Irina and Rares
+let numbers = [1,2,3,4,5,6,7,8,9,10]; // add numbers from 1 to 10 into this array
+let mentors = ['Daniel', 'Irina', 'Rares']; // Create an array with the names of the mentors: Daniel, Irina and Rares
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/C-array-get-set/exercise.js

@@ -5,11 +5,11 @@
 */
 
 function first(arr) {
-  return; // complete this statement
+  return arr[0]; // complete this statement
 }
 
 function last(arr) {
-  return; // complete this statement
+  return arr[arr.length - 1 ]; // complete this statement
 }
 
 /* 

1-exercises/C-array-get-set/exercises2.js

@@ -7,7 +7,8 @@
 */
 
 let numbers = [1, 2, 3]; // Don't change this array literal declaration
-
+numbers.push(4);
+numbers[0] = 1;
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

1-exercises/D-for-loop/exercise.js

@@ -27,7 +27,9 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
-
+for(let i = 0; i < WRITERS.length; i++){
+    console.log(`${WRITERS[i]} is ${AGES[i]} years old`);
+}
 /*
 The output should look something like this:
 

1-exercises/E-while-loop-with-array/exercise.js

@@ -18,6 +18,14 @@ const BIRTHDAYS = [
 
 function findFirstJulyBDay(birthdays) {
     // TODO
+    let i = 0;
+    while (i < BIRTHDAYS.length){
+        if(BIRTHDAYS[i].includes("July")){
+            return BIRTHDAYS[i];
+        }
+        i++;
+    }
+
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"