Programming

&

JavaScript

Lonce Wyse

Communication & New Media

lonce.wyse@cnm.nus.sg

General purpose languages

• C, C++, Basic,  Java
• Based on common fundamental concepts
• JavaScript, the most pervasive language in the world

Essential Elements

•  
• Numbers:    7, 100,  3.1516
•  
• Strings:         "Hello World"
•  
• Operators:  
  • arithmetic:    +, -, *, /, %, ++, --
  • assignment:  =, +=, -=
  • logical :           ===, !==, <, >, <=, >=
•  
• Variables:       x,  y,  foo,  bar;

Essential Elements

​

• Keywords for creating Variables:      
  • var x;    // historical way
    • var x=0;
  • let x;   // modern way
    • let x=0;
  • // if your 'variable' is constant
    • ​const x=0;

a) Running JavaScript and (later)

b) Serving our Web pages