FLEX is a dynamically typed programming language developed with the principals of RISC in mind. The idea is that every type of definition will follow the same format so as to minimize confusion and maximize consistency.

Find below the Usage Details for FLEX

To run a Flex program, all that is required is to use the flex executable as shown below

./flex <progName>.flex

Note that a real definition cannot begin with a period (ie, .5 must be changed to 0.5)

var myVar = 5;
var myVar = 5.5;
var myVar = "hello";
var myVar = "c";

Characters are simply strings of length 1 in FLEX. Booleans are not included as they are superfluous w/ the use of 1-true, 0-false integers.

FLEX comes with many built-in operations for integers and real values, including Addition, Subtraction, Multiplication, Division, Modulo, and comparisons. These come in the exact same form as C operations:

var a = 5 + 6;
a * 10;
...

define function fcName(var a, var b) {...}

Note that arguments are optional like any modern language

Note that there is a trailing semicolon as a lambda function is part of a statement

var myFc = lambda() { print("hello, world"); };

define class MyClass {...}

var jClass = new _MyClass()_;

Member access is very similar to Java:

print(jClass.a);

Method calling also resembles java

jClass.methodName();

Conditionals in FLEX are exactly like that of C syntax:

if (x < 5)
{
	print("hello world");
}
else if (...) { ... }

A simple while loop in FLEX again follows the syntax of C

while (x < 5)
{
	// do something
}

Comments directly follow C

/* Multi-line Comment here */
// Single-line Comment here

Arrays are created via a few different built-in functions: To create an array: var arr = newArray(5) //where 5 is the size of the new array To update an array index: setArray(arr, 0, 12); //set arr[0] = 12 To get an element of an array: getArray(arr, 0); //return the value at arr[0]

Command line arguments are implicitly included in FLEX, so there is no need to retrieve them. To access the number of command line arguments:

var numArgs = getArgCount();

To access an argument and a given index, i:

var arg = getArg(i);

You can create filepointers in FLEX just like in other languages:

var fp = openReadFile(<filename>);	// Opens a file for reading

To read integers, do the following

var currInt = readInt(fp);		// Assuming fp has been initialized as above