Execution flow control

Statements: 
   if...else statement
   for ;
   do…while; 
   while ; 
   switch; 
   for…in ; 
   for…of; 
   loop control (label; break ; continue );

1. (Done) if...else statement - basic usage with/without else;
2. understand the logic, sequence of checks, diagrams for all loops;
3. (Done)"for" loop purpose and basic practical usage;
4. "while" loop - basic practical usage;
5. "do-while" loop  - basic practical usage;
6. "switch" - basic practial usage. break; usage, what type could be ander switch;
7. for…in ; - don't need
8. for…of;  - don't need
9. loop control (label; break ; continue ); couple practical samples
  
====== links 
General –
http://www.techotopia.com/index.php/JavaScript_Flow_Control_and_Looping
techotopia.com:  flow control and loops overview 

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling
developer.mozilla.org: Control flow and error handling overview

1. ---
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/if...else
developer.mozilla.org "if" statement

2. ---
TBD (to be determined)

3. ---
TBD (to be determined)

4. ---
TBD (to be determined)

5. ---
TBD (to be determined)

6. ---
TBD (to be determined)

7. ---
TBD (to be determined)

8. ---
TBD (to be determined)

9. ---
  https://en.wikibooks.org/wiki/Common_JavaScript_Manual/Break,_continue,_labels
wikibooks.org: Break, continue, labels

  
====== Approved problems
1. ---------------------------------------
- question 
Modify the snippet to use "if" statement to alert "It is night." in case the variable "isNight" is true and "It is not night." otherwise.

– proposed snippet to modify
var isNight=true; // false

// put you if here
alert("It is night.");
alert("It is not night.");

– answer
var isNight=true; // false

if (isNight) {
    alert("It is night.") 
} else {
  alert("It is not night.")
}

1. ------------------------------------------------------------------------------------------------------------------
- question 
Develop an snippet to use "if" statement to alert "The size fits" in case the variable "size" value is greater than 5 but less than 7.

– proposed snippet to modify
var size=5; // 6, 8

// put you if here
alert("The size fits");


– answer
var size=5; // 6, 8

if ( size > 5 and size < 7) {
    alert("The size fits");
} 


1. ------------------------------------------------------------------------------------------------------------------
- question 
Develop an snippet to use "if" statement to alert "You are to young" in case the variable "age" is less or equal 17.

– proposed snippet to modify
var age=15; // 22

// put you if here
alert("You are to young");

– answer
var age=15; // 22

if (age <= 17) {
    alert("You are to young");
} 


1. ------------------------------------------------------------------------------------------------------------------
- question 
Develop an snippet to use "if" statement to alert "type is number" if  in case the type variable "theVar"  is number, "type is string" if type is string less, "type is something else"  otherwise.

– proposed snippet to modify
var theVar=15; // "hello", [1];

// put you if here
alert("type is number");
alert("type is string");
alert("type is something else");

– answer
var theVar=15; // "hello", [1];

if (typeof theVar == "number") {
    alert("type is number");
} else if (typeof theVar == "string")  {
   alert("type is string"); 
} else {
    alert("type is something else");
}


3. -------------
Use "for" loop to concatenate all array elements in one string separated by ";"

4. -------------
Use "while" loop to concatenate all array elements in one string separated by ";"

5. -------------
Use "while-do" loop to concatenate all array elements in one string separated by ";"

3. -------------
replace "while" loop with "for" loop without changing the logic of snippet
var i = 0;
while (i < 100) {
  console.log(’Currently at ’ + i);
  i++; // increment i 
}

4. -------------
replace "for" loop with "while" loop without changing the logic of snippet


====== Suggested problems



---------------