JavaScript/Lexical structure/Exercises

{Which line(s) lead to a syntax error? /* 1 */ "use strict;" /* 2 */ let a = 0 /* 3 */ let b = 0 //; /* 4 */ let /* 5 */ c = 0; |type="[]"} - Line 1 - Line 2 - Line 3 - Line 4 - Line 5 + None of the above {Which line(s) lead to a syntax error? /* 1 */ "use strict;" /* 2 */ let personName = "Hagar den skrækkelige"; /* 3 */ let Hägar = "Hägar the Horrible"; /* 4 */ let ä = "Hägar the Horrible"; /* 5 */ let Hägar = "Hagar den skrækkelige"; |type="[]"} - Line 1 - Line 2 - Line 3 - Line 4 + Line 5 - None of the above {Which line(s) lead to a syntax error? /* 1 */ "use strict;" /* 2 */ let isOpen = true // or "true" ??? or TRUE ??? /* 3 */ isOpen = 5; /* 4 */ let _isOpen = false; /* 5 */ isOpen = _isOpen |type="[]"} - Line 1 - Line 2 - Line 3 - Line 4 - Line 5 + None of the above {Which line(s) lead to a syntax error? /* 1 */ "use strict;" /* 2 */ let countFiles = 5; /* 3 */ countFiles = countFiles + /* or is it minus?? */ 1; /* 4 */ countFiles = CountFiles * 2; /* 5 */ // const twoFiles = 10; /* 6 */ // const 2Files = 10; |type="[]"} - Line 1 - Line 2 - Line 3 + Line 4 - Line 5 - Line 6 - None of the above Be creative Create a code snippet with 3 valid and 3 invalid variable declarations. Create a code snippet with extensive comments, e.g.: explain WHY you have used certain variable names, whether this snippet is part of a huge project, what the author's name is, when the snippet was created, ... . Create a code snippet and use non-Latin characters as variable names.