Js/ week2/ali haider

week-2/1-exercises/A-expressions/README.md

@@ -64,3 +64,32 @@ $
 * Check the value of the variables
 
 Further reading on using the node console: https://hackernoon.com/know-node-repl-better-dbd15bca0af6
+
+some examples I tried on terminal :
+
+ali@DESKTOP-QSBNI26:/mnt/c/Users/ALI HAIDER/Documents/GitHub/JavaScript-Core-1-Homework$ node
+Welcome to Node.js v13.14.0.
+Type ".help" for more information.
+> 1+2
+3
+> "hello"
+'hello'
+> var greeting = "hello"
+undefined
+> greeting
+'hello'
+> console.log(greeting);
+hello
+undefined
+> .exit
+ali@DESKTOP-QSBNI26:/mnt/c/Users/ALI HAIDER/Documents/GitHub/JavaScript-Core-1-Homework$ node
+Welcome to Node.js v13.14.0.
+Type ".help" for more information.
+> 1+2
+3
+> a+b
+Uncaught ReferenceError: a is not defined
+> var a =2
+undefined
+> a
+2

week-2/1-exercises/B-boolean-literals/exercise.js

@@ -6,7 +6,9 @@
 */
 
 var codeYourFutureIsGreat = true;
-
+var mozafarIsCool = false;
+var calculationCorrect = true;
+var moreThan10Students = false;
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

week-2/1-exercises/C-comparison-operators/exercise.js

@@ -7,14 +7,14 @@
 
 var studentCount = 16;
 var mentorCount = 9;
-var moreStudentsThanMentors; // finish this statement
+var moreStudentsThanMentors= studentCount>mentorCount; // finish this statement
 
 var roomMaxCapacity = 25;
-var enoughSpaceInRoom; // finish this statement
+var enoughSpaceInRoom= true; // finish this statement
 
 var personA = "Daniel";
 var personB = "Irina";
-var sameName; // finish this statement
+var sameName = (personA === personB); // finish this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/D-predicates/exercise.js

@@ -7,12 +7,22 @@
 
 // Finish the predicate function to test if the passed number is negative (less than zero)
 function isNegative(number) {
-
+    if( number < 0){
+      return true;
+    }
+    else
+    { return false;
+    }
 }
 
 // Finish the predicate function to test if the passed number is between 0 and 10
 function isBetweenZeroAnd10(number) {
-
+   if ( number >0 && number <=10){
+      return true;
+   }
+   else {
+     return false;
+   }
 }
 
 /* 

week-2/1-exercises/E-conditionals/exercise.js

@@ -9,6 +9,13 @@
 var name = "Daniel";
 var danielsRole = "mentor";
 
+if (danielsRole === "mentor"){
+  console.log("Hi, I'm "+name+", I'm a mentor.");
+}
+else if (danielsRole === "student"){
+  console.log("Hi, I'm " + name + ", I'm a student.");
+}
+
 /* 
 EXPECTED RESULT
 ---------------

week-2/1-exercises/F-logical-operators/exercise.js

@@ -11,14 +11,14 @@ var cssLevel = 4;
 
 // Finish the statement to check whether HTML, CSS knowledge are above 5
 // (hint: use the comparison operator from before)
-var htmlLevelAbove5;
-var cssLevelAbove5;
+var htmlLevelAbove5 = htmlLevel > 5;
+var cssLevelAbove5 = cssLevel > 5;
 
 // Finish the next two statement
 // Use the previous variables and logical operators
 // Do not "hardcode" the answers
-var cssAndHtmlAbove5;
-var cssOrHtmlAbove5;
+var cssAndHtmlAbove5 = htmlLevelAbove5 && cssLevelAbove5;
+var cssOrHtmlAbove5 = htmlLevelAbove5 || cssLevelAbove5;
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/F-logical-operators/exercise2.js

@@ -5,7 +5,41 @@
   Update the code so that you get the expected result.
 */
 
-function isNegative() {}
+function isNegative(number) {
+  if ( number < 0){
+    return true;
+  }
+  else {
+    return false;
+  }
+}
+  function isBetween5and10( number){
+    if (number >5  && number<= 10){
+      return true;
+    }
+    else {
+      return false;
+    }
+  }
+
+  function isShortName(name) {
+     if ( name.length <7){
+       return true;
+     }
+     else {
+       return false;
+     }
+  }
+  function startsWithD(name){
+    if(name [0] === "D")
+    {
+      return true;
+
+    }
+    else {
+      return false;
+    }
+  }
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/G-conditionals-2/exercise-1.js

@@ -7,7 +7,15 @@
 */
 
 function negativeOrPositive(number) {
-
+   if( number <0){
+     return "negative";
+   }
+   else if (number >=0){
+     return  "positive";
+   }
+   else {
+     return "error"
+   }
 }
 
 /* 

week-2/1-exercises/G-conditionals-2/exercise-2.js

@@ -8,7 +8,12 @@
 */
 
 function studentPassed(grade) {
-
+  if ( grade < 50){
+    return "failed";
+  }
+  else {
+    return "passed";
+  }
 }
 
 /* 

week-2/1-exercises/G-conditionals-2/exercise-3.js

@@ -9,7 +9,18 @@
 */
 
 function calculateGrade(mark) {
-
+  if(mark >= 80){
+    return "A";
+  }
+  else if (mark <80 && mark > 60){
+    return "B";
+  }
+  else if (mark <=60 && mark >50){
+    return "C";
+  }
+  else {
+    return "F";
+  }
 }
 
 /* 

week-2/1-exercises/G-conditionals-2/exercise-4.js

@@ -9,7 +9,12 @@
 */
 
 function containsCode(sentence) {
-
+  if ( sentence.includes("code")){
+    return true;
+  }
+  else {
+    return false;
+  }
 }
 
 /* 

week-2/1-exercises/H-array-literals/exercise.js

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

week-2/1-exercises/I-array-properties/exercise.js

@@ -6,9 +6,13 @@
 */
 
 function isEmpty(arr) {
-  return; // complete this statement
+  if( arr.length >= 1){
+  return false; // complete this statement
+}
+else {
+  return true;
+}
 }
-
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

week-2/1-exercises/J-array-get-set/exercise.js

@@ -5,11 +5,12 @@
 */
 
 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
 }
 
 /* 

week-2/1-exercises/J-array-get-set/exercises2.js

@@ -7,7 +7,7 @@
 */
 
 var numbers = [1, 2, 3]; // Don't change this array literal declaration
-
+   numbers[3] = 4;
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */

week-2/2-mandatory/1-fix-functions.js

@@ -1,42 +1,39 @@
 // The below functions are syntactically correct but not outputting the right results.
 // Look at the tests and see how you can fix them.
 
-function mood() {
-  let isHappy = true;
-
-  if (isHappy) {
-    return "I am happy";
-  } else {
+function mood(str) {
+  if(str == true){
+  return "I am happy";
+  }
+  else {
     return "I am not happy";
   }
+
 }
 
 function greaterThan10(num) {
-  let isBigEnough;
+  let isBigEnough = num;
 
-  if (isBigEnough) {
+  if (isBigEnough > 10) {
     return "num is greater than 10";
   } else {
     return "num is not big enough";
   }
 }
 
 function sortArray(letters) {
-  let sortedLetters = letters;
-
+  let sortedLetters = letters.sort();
   return sortedLetters;
 }
 
 function first5(numbers) {
-  let sliced;
-
+  let sliced = numbers.slice(0,5);
   return sliced;
 }
 
 function get3rdIndex(arr) {
   let index = 3;
-  let element;
-
+  let element = arr[index];
   return element;
 }