SI110: Javascript Batch Interpreter

	program		Error Messages
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JavaScript Cheat Sheet

line comments: // ... is a line comment, text on the rest of the line is ignored
block comments: /* ... */ is a block comment, text between the open /* and close */ is ignored. Allows multiple line comments.
arithmetic: + - * / %←means remainder. ^ is not for exponentiation!
math functions: Math.sin( ), Math.cos( ), Math.log( ), Math.exp( ), Math.sqrt( ), Math.floor( )
math constants: Math.PI, Math.E, (Math Object reference)
variables: define like var x; or var x = 0;. Assign like x = x + 1;
semicolon: use ; to terminate statements, e.g. var x; x = 17;
string literals: "hi" or 'hi' or 'I said "hi", right?'
escaping: within a string literal, \" for ", \' for ', \\ for \, \n for newline
string operations: "a" + "b" → ab, "foobar"[3] → b, "foobar".length → 6
strings and ASCII: string.length, string.charCodeAt[index] (String Object reference)
typeof: returns type name as a string, e.g. typeof(43*7) → Number
conversions: String-to-Number Number("42"), Number-to-String String(42)
alert: display pop-up window with text, e.g. alert("Hello World!");
prompt: get string from user via pop-up window, e.g var n = prompt("Enter your name");