My solution proposals for the Basic JavaScript exercises.

freeCodeCamp module description:

"JavaScript is a scripting language you can use to make web pages interactive. It is one of the core technologies of the web, along with HTML and CSS, and is supported by all modern browsers. In this course, you'll learn fundamental programming concepts in JavaScript. You'll start with basic data structures like numbers and strings. Then you'll learn to work with arrays, objects, functions, loops, if/else statements, and more."

1. Comment Your JavaScript Code
2. Declare JavaScript Variables
3. Storing Values with the Assignment Operator
4. Assigning the Value of One Variable to Another
5. Initializing Variables with the Assignment Operator
6. Declare String Variables
7. Understanding Uninitialized Variables
8. Understanding Case Sensitivity in Variables
9. Explore Differences Between the var and let Keywords
10. Declare a Read-Only Variable with the const Keyword
11. Add Two Numbers with JavaScript
12. Subtract One Number from Another with JavaScript
13. Multiply Two Numbers with JavaScript
14. Divide One Number by Another with JavaScript
15. Increment a Number with JavaScript
16. Decrement a Number with JavaScript
17. Create Decimal Numbers with JavaScript
18. Multiply Two Decimals with JavaScript
19. Divide One Decimal by Another with JavaScript
20. Finding a Remainder in JavaScript
21. Compound Assignment With Augmented Addition
22. Compound Assignment With Augmented Subtraction
23. Compound Assignment With Augmented Multiplication
24. Compound Assignment With Augmented Division
25. Escaping Literal Quotes in Strings
26. Quoting Strings with Single Quotes
27. Escape Sequences in Strings
28. Concatenating Strings with Plus Operator
29. Concatenating Strings with the Plus Equals Operator
30. Constructing Strings with Variables
31. Appending Variables to Strings
32. Find the Length of a String
33. Use Bracket Notation to Find the First Character in a String
34. Understand String Immutability
35. Use Bracket Notation to Find the Nth Character in a String
36. Use Bracket Notation to Find the Last Character in a String
37. Use Bracket Notation to Find the Nth-to-Last Character in a String
38. Word Blanks
39. Store Multiple Values in one Variable using JavaScript Arrays
40. Nest one Array within Another Array
41. Access Array Data with Indexes
42. Modify Array Data With Indexes
43. Access Multi-Dimensional Arrays With Indexes
44. Manipulate Arrays With push()
45. Manipulate Arrays With pop()
46. Manipulate Arrays With shift()
47. Manipulate Arrays With unshift()
48. Shopping List
49. Write Reusable JavaScript with Functions
50. Passing Values to Functions with Arguments
51. Return a Value from a Function with Return
52. Global Scope and Functions
53. Local Scope and Functions
54. Global vs. Local Scope in Functions
55. Understanding Undefined Value returned from a Function
56. Assignment with a Returned Value
57. Stand in Line
58. Understanding Boolean Values
59. Use Conditional Logic with If Statements
60. Comparison with the Equality Operator
61. Comparison with the Strict Equality Operator
62. Practice comparing different values
63. Comparison with the Inequality Operator
64. Comparison with the Strict Inequality Operator
65. Comparison with the Greater Than Operator
66. Comparison with the Greater Than Or Equal To Operator
67. Comparison with the Less Than Operator
68. Comparison with the Less Than Or Equal To Operator
69. Comparisons with the Logical And Operator
70. Comparisons with the Logical Or Operator
71. Introducing Else Statements
72. Introducing Else If Statements
73. Logical Order in If Else Statements
74. Chaining If Else Statements
75. Golf Code
76. Selecting from Many Options with Switch Statements
77. Adding a Default Option in Switch Statements
78. Multiple Identical Options in Switch Statements
79. Replacing If Else Chains with Switch
80. Returning Boolean Values from Functions
81. Return Early Pattern for Functions
82. Counting Cards
83. Build JavaScript Objects
84. Accessing Object Properties with Dot Notation
85. Accessing Object Properties with Bracket Notation
86. Accessing Object Properties with Variables
87. Updating Object Properties
88. Add New Properties to a JavaScript Object
89. Delete Properties from a JavaScript Object
90. Using Objects for Lookups
91. Testing Objects for Properties
92. Manipulating Complex Objects
93. Accessing Nested Objects
94. Accessing Nested Arrays
95. Record Collection
96. Iterate with JavaScript While Loops
97. Iterate with JavaScript For Loops
98. Iterate Odd Numbers With a For Loop
99. Count Backwards With a For Loop
100. Iterate Through an Array with a For Loop
101. Nesting For Loops
102. Iterate with JavaScript Do...While Loops
103. Replace Loops using Recursion
104. Profile Lookup
105. Generate Random Fractions with JavaScript
106. Generate Random Whole Numbers with JavaScript
107. Generate Random Whole Numbers within a Range
108. Use the parseInt Function
109. Use the parseInt Function with a Radix
110. Use the Conditional (Ternary) Operator
111. Use Multiple Conditional (Ternary) Operators
112. Use Recursion to Create a Countdown
113. Use Recursion to Create a Range of Numbers