added few solved by loop

Author: shihabuddin-dev

D. Loop/Array-loop/single-string.js

@@ -10,13 +10,13 @@ Output: 'TomTimTinTik'
 let names = ['Tom', 'Tim', 'Tin', 'Tik'];
 
 // Solution-1 
-let newArray = '';
+let newString = '';
 for (let name of names) {
-    newArray += name
+    newString += name
 }
-console.log(newArray);
+console.log(`"${newString}"`);
 
 
 // Solution-2 (Short)
 let addAllName = names.join('');
-console.log(addAllName);
+console.log(`'${addAllName}'`);

D. Loop/Array-loop/split-reverse-join.js

@@ -8,4 +8,4 @@ Output: "I am a hard working person"
 */
 const statement = "I am a hard working person";
 let reverseStatement = statement.split(" ").reverse().join(" ");
-console.log(reverseStatement);
+console.log(`"${reverseStatement}"`);

E. Object/access-object-property.js

@@ -0,0 +1,32 @@
+/* Problem-3
+
+Display the physics marks as output.
+
+const student = {
+    name: "Hamim Sakep",
+    id: 5421,
+    physics: {
+        subject: "HSC Physics",
+        author: "Shahjahan Tapan",
+        marks: 30
+    }
+};
+ */
+
+const student = {
+    name: "Hamim Sakep",
+    id: 5421,
+    physics: {
+        subject: "HSC Physics",
+        author: "Shahjahan Tapan",
+        marks: 30
+    }
+};
+
+// Solution-1 by dot notation 
+let physicsMarks = student.physics.marks;
+console.log(physicsMarks);
+
+// Solution-2 by bracket notation 
+let physicsMark = student["physics"]["marks"];
+console.log(physicsMark);

E. Object/add-property.js

@@ -0,0 +1,25 @@
+/* Problem-2
+
+For this object below add a property named passenger capacity with value 5
+
+const car = {
+    make: "Toyota",
+    model: "Corolla",
+    year: 2020 };
+ */
+
+const car = {
+    make: "Toyota",
+    model: "Corolla",
+    year: 2020
+};
+
+// Solution-1 by bracket notation
+car["passenger capacity"] = 5;
+console.log(car);
+
+
+
+// Solution-2 by object method
+Object.assign(car, { "passenger capacity ": 5 });
+console.log(car);

E. Object/count-property.js

@@ -0,0 +1,21 @@
+/* Problem-3
+
+Count the number of properties.
+
+let student = {
+    name: 'Ariana Grande',
+    age: 21,
+    city: 'Gaibandha',
+    isStudent: true
+};
+ */
+
+let student = {
+    name: 'Ariana Grande',
+    age: 21,
+    city: 'Gaibandha',
+    isStudent: true
+};
+
+let count = Object.keys(student);
+console.log(count.length);

E. Object/object-&-loop.js

@@ -0,0 +1,30 @@
+/* Problem-4
+
+Loop through an object and print the key - value pairs with their types
+
+Input:
+
+
+let myObject = {
+    name: 'John Doe',
+    age: 25,
+    city: 'Example City',
+    isStudent: true
+};
+
+Output:
+key: name | type: string
+key: age | type: number
+key: city | type: string
+key: isStudent | type: boolean
+*/
+
+let myObject = {
+    name: 'John Doe',
+    age: 25,
+    city: 'Example City',
+    isStudent: true
+};
+for (let obj in myObject) {
+    console.log(` key: ${obj} | type: ${typeof myObject[obj]} `);
+}

E. Object/select-color.js

@@ -0,0 +1,21 @@
+/* Problem-1
+Access the golden rod color value in output.
+
+const colors = {
+    red: "#ff0000",
+    green: "#00ff00",
+    blue: "#0000ff",
+    "golden rod": '#daa520'
+};
+ */
+
+const colors = {
+    red: "#ff0000",
+    green: "#00ff00",
+    blue: "#0000ff",
+    "golden rod": '#daa520'
+};
+
+const goldenRodColor = (colors["golden rod"]);
+
+console.log("This is olden rod color : ", goldenRodColor);