Basic HTML version of Foils prepared 23 June 1997

Foil 22 JavaScript Expressions - II

From JavaScript Tutorial for Certificate Course UC Web applications Certificate -- Summer 97. by Geoffrey C. Fox, Tom Scavo

String Operators: the Concatenation Operator
1 Bitwise logical operators: & (AND) | (OR) ^ (XOR) operate on two numbers expressed in 32-bit integer form and perform indicated logical operation on each bit separately
2 << is bitwise left shift discarding bits at left (high order) and zero filling at right
3 >> is bitwise right shift propagating the sign bit in high order (position 31)
4 >>> is zero fill right shift with no special treatment of sign bit
5 Boolean operators are && (AND), || (OR), ! (NOT) and can only operate on boolean variables that are true or false
6 Relational operators are == > >= < <= != which can be used on numeric or string variables
7 Concatenation operator (+) joins two strings together:
8 x = "Hello "; y = "World!";
9 // x + y is "Hello World!"
  • Note + is written . in PERL

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