Department

Engineering

Course Code

ENGR 101

Professor

Jeffrey Ringenberg

Lecture

3

It#checks#the#current#value#of#X#and#sees#if#it#less#than#5

○

The#result#is#called# a#truth%value,%it#is#

○

X#<#5#

o

either#false#(0)#or#true#(1)

Consider#the#following#equation:

•

•

If#both#are#true,#the#whole#is#true#

○

The#&%operator#implements#logical%and%

o

Logical%operator%can#combine#two#truth#values#according#to#the#rules#of#formal%logic%

•

One#or#the#other,#or#both

○

Inclusive%or%(or)

o

One#or#the#other,#but#NOT#both

○

Exclusive%or (xor)

o

Inclusive#or#exclusive#"or"

•

•

If#x#=#10,#it'll#=#1#

o

Write#1#<#x#&#x#<#5

o

Don't#write#1#<#x#<#5

•

1s#and#0s#in#a#logical#array#are#completely#different#type#of#data#than#regular#

numbers#

o

When#we#put#a#[regular#array]#between#the#()#in#an#indexing#expression,#we#

select#those#indices.

o

The#result#of#a#relational#or#logical#operator#is#a#logical%array%

•

==#are#for#logical# operators,#while#=#aren't#

•

Ex.#logical[1,0;0,1]#

o

If#you#want#to#hardcore#a#logical#matrix,#you#need#to#wrap#it#up#in#the#logical#function

•

Any#=#any#nonzero#number#in#a#matrix,#vector,#scalar…#

•

All#=#evaluates#if#all#elements#are#nonzero.#

•

•

Logical(operator(

Wednesday,# September# 27,#2017

9:49#AM

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