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Expand file tree Collapse file tree Original file line number Diff line number Diff line change 1+ # Title
2+
3+ Description
Original file line number Diff line number Diff line change 1+ "use strict" ;
2+
3+ var circleArea1 = function ( r ) {
4+ var PI = 3.14 ;
5+ var area = PI * r * r ;
6+ return area ;
7+ } ;
8+
9+ let circleArea2 = ( r ) => {
10+ const PI = 3.14 ;
11+ let area = PI * r * r ;
12+ return area ;
13+ } ;
14+
15+ let circleArea3 = ( r ) => 3.14 * r * r ;
16+
17+ console . log ( circleArea1 ( 7 ) ) ;
18+ console . log ( circleArea2 ( 7 ) ) ;
19+ console . log ( circleArea3 ( 7 ) ) ;
Original file line number Diff line number Diff line change 1+ # Title
2+
3+ Description
Original file line number Diff line number Diff line change 1+ "use strict" ;
2+
3+ const PI = 3.14159 ;
4+ console . log ( PI ) ;
5+
6+ // TypeError: Assignment to constant variable.
7+ // PI = 43;
Original file line number Diff line number Diff line change 1+ # let
2+
3+ The let statement declares a block scope local variable.
Original file line number Diff line number Diff line change 1+ "use strict" ;
2+
3+ let movie = 'Good Will Hunting' ;
4+
5+ function theNotebook ( ) {
6+ let movie = 'The Notebook' ;
7+ return movie ;
8+ }
9+
10+ function randomFunction ( ) {
11+ let isFan = true ;
12+ let phrase = 'Bacon is good' ;
13+ console . log ( '\nBefore if:' , phrase ) ;
14+
15+ if ( isFan ) {
16+ let phrase = 'I am a horse' ;
17+ console . log ( 'Inside if:' , phrase ) ;
18+ }
19+
20+ console . log ( 'After if:' , phrase ) ;
21+ }
22+
23+ console . log ( movie ) ; // Good Will Hunting
24+ console . log ( theNotebook ( ) ) ; // The Notebook
25+ console . log ( movie ) ; // Good Will Hunting
26+
27+ randomFunction ( ) ;
Original file line number Diff line number Diff line change 1+ # Title
2+
3+ Description
Original file line number Diff line number Diff line change 1+ "use strict" ;
2+
3+
4+ let name = 'Bucky' ;
5+
6+ console . log ( `My favorite person is ${ name } because he smells good.` ) ;
7+ console . log ( `My favorite person is ${ name } because he smells good. Wait...
8+ can I really type on multiple lines now?` ) ;
Original file line number Diff line number Diff line change 1- /**
2- * Created by Bucky on 7/2/2016.
3- */
1+ "use strict" ;
2+
3+
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