comparison.js

这是《JavaScript学习源代码》一书的源代码

var teststrings1 = ( "JavaScript" == "JavaScript" );
var teststrings2 = ( "JavaScript" == "javascript" );
var testnumbers1 = ( 1.785 == 1.785 );
var testnumbers2 = ( 5 != 5 );
var testlessthan1 = ( 100 < 200 );
var testlessthan2 = ( 100 < 100 );
var testlessthan_or_equal = ( 100 <= 100 );
var testgreaterthan = ( -1 > 1 );
var a = 8, b = 8.0, testvariables1 = ( a == b );
var c = null, d = null, testvariables2 = ( c == d );
var testbooleans1 = ( true == true );
var testbooleans2 = ( false != false );

var result = "TEST STRINGS 1: "+ teststrings1+ "  2: " + teststrings2+ "\n\n";
result += "TEST NUMBERS 1: " +testnumbers1+ "  2: " + testnumbers2+ "\n\n";
result += "TEST LESS THAN 1: " +testlessthan1+ "  2: " +testlessthan2+ "\n\n";
result += "TEST LESS THAN OR EQUAL: " +testlessthan_or_equal+ "\n\n";
result += "TEST GREATER THAN: " +testgreaterthan+ "\n\n";
result += "TEST VARIABLES 1: " +testvariables1+ "  2: " +testvariables2+ "\n\n";
result += "TEST BOOLEANS 1: " +testbooleans1 + "  2: " +testbooleans2+ "\n\n";

alert(result);