slogo.instruction

Class IsLess

java.lang.Object

slogo.GrammarElement

slogo.instruction.Instruction

slogo.instruction.IsLess

public class IsLess
extends Instruction

Returns 1(:TRUE) if its first input is strictly less than its second, or 0 otherwise (:FALSE)

Field Summary

Fields

Modifier and Type	Field and Description
private ArithmeticBase	numOne
private ArithmeticBase	numTwo

Fields inherited from class slogo.GrammarElement

gelementsToValue

Constructor Summary

Constructors

Constructor and Description
IsLess(ArithmeticBase num1, ArithmeticBase num2) Constructs an IsLess instruction

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(Context c) Evaluate this language construct in some context.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

numOne

private ArithmeticBase numOne

numTwo

private ArithmeticBase numTwo

Constructor Detail

IsLess

public IsLess(ArithmeticBase num1,
              ArithmeticBase num2)

Constructs an IsLess instruction

Parameters:

num1 - is the first ArithmeticBase in the comparison

num2 - is the second ArithmeticBase in the comparison

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

the String representation LESS num1 num2

evaluate

public java.lang.Object evaluate(Context c)

Description copied from class: GrammarElement

Evaluate this language construct in some context. The evaluation may have side-effects, e.g., moving a turtle.

Specified by:

evaluate in class Instruction

Parameters:

c - is the Context of what we are evaluating

Returns:

1 if valOne is less than valTwo and 0 otherwise