Understanding OR Logic

Using the OR Operator
If you need to take action when either one or the other of two conditions is met, you can use two separate, nested selection structures, as in the previous examples. However, most programming languages allow you to make two or more decisions in a single comparison by using a conditional OR operator (or simply the OR operator).

When you use the logical OR operator, only one of the listed conditions must be met for the resulting action to take place. Quick reference 2-1 contains the truth table for the OR operator. As you can see in the table, the entire expression x OR y is false only when x and y each are false individually.


For example, suppose the cell phone company has established a new fee schedule as follows: The basic monthly service bill is $30. An additional $20 is billed to customers who make more than 100 calls or send more than 200 text messages.


If the programming language you use supports the OR operator, you still must realize that the comparison you place first is the expression that will be evaluated first, and cases that pass the test of the first comparison will not proceed to the second comparison. As with the AND operator, this feature is called short-circuiting. The computer can ask only one question at a time; even when you write code as shown at the top of Figure 2-1, the computer will execute the logic shown at the bottom.
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Logic Example



Let's say people GOING IN is x(considered 1 when a man is sensed and 0 if none), those who are GOING OUT is y(considered 1 when a man is sensed and 0 if none), and the movement of the door is the result(considered 1 when it opens and 0 if not).

With that, I have made this truth table.

The topic is very well explained but sir, naguguluhan lang ako, anong pinagkaiba niya sa While Statement? Yun po kasi ang hindi ko mapagtanto

rheigne wrote:The topic is very well explained but sir, naguguluhan lang ako, anong pinagkaiba niya sa While Statement? Yun po kasi ang hindi ko mapagtanto

yung while eh ginagamit sa looping, hindi pa naman tayo nagloloop dito

rheigne wrote:The topic is very well explained but sir, naguguluhan lang ako, anong pinagkaiba niya sa While Statement? Yun po kasi ang hindi ko mapagtanto

Ang topic ni sir dito ay about selection. S looping p ung while statement.

This topic is very nice, sir you're a great teacher,but I do not understand much, I'm a little confused, but I try my best to understand.

The topic is very well explained sir.

justjoking10 wrote:The topic is very well explained sir.

That's good to know from you. Are you sure you understand? Can you give another example?

jander wrote:This topic is very nice, sir you're a great teacher,but I do not understand much, I'm a little confused, but I try my best to understand.

I will also give my best for you to understand. What part are you confused?

Thank you for posting this, a big help for me understanding OR logic. I will assure you that I will perform well the next time

Luwiezz wrote:Thank you for posting this, a big help for me understanding OR logic. I will assure you that I will perform well the next time

Good to know that this forum helps you. You can share this to your friends to let them know and understand OR Logic too.

Regarding sa tanong ni rheign . Yung WHILE STATEMENT sa loop yun rheign tapos kapag OR LOGIC ang gamit mo lang jan is yung IF STATEMENT . pero pwede ka din naman ata mag OR LOGIC SA WHILE LOOP I guess. di lang ako sure sana masagot ni sir if pwede . hehehe .

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Admin wrote:

justjoking10 wrote:The topic is very well explained sir.

That's good to know from you. Are you sure you understand? Can you give another example?

Pamasahe po s jeep.

if customer is Senior OR Student then
WITH DISCOUNT
else
NO DISCOUNT

Sean Monacillo wrote:Regarding sa tanong ni rheign . Yung WHILE STATEMENT sa loop yun rheign tapos kapag OR LOGIC ang gamit mo lang jan is yung IF STATEMENT . pero pwede ka din naman ata mag OR LOGIC SA WHILE LOOP I guess. di lang ako sure sana masagot ni sir if pwede .  hehehe .

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Yes you can incorporate OR in a Loop.

justjoking10 wrote:

Admin wrote:

justjoking10 wrote:The topic is very well explained sir.

That's good to know from you. Are you sure you understand? Can you give another example?

Pamasahe po s jeep.

if customer is Senior OR Student then
WITH DISCOUNT
else
NO DISCOUNT

Very Good. Ang nagkakagulo ngayon dyan eh yung process after that, diba 20% ang discount so magkano dapat ang binabayad ng STUDENT or SENIOR?

Admin wrote:

justjoking10 wrote:

Admin wrote:

justjoking10 wrote:The topic is very well explained sir.

That's good to know from you. Are you sure you understand? Can you give another example?

Pamasahe po s jeep.

if customer is Senior OR Student then
WITH DISCOUNT
else
NO DISCOUNT

Very Good. Ang nagkakagulo ngayon dyan eh yung process after that, diba 20% ang discount so magkano dapat ang binabayad ng STUDENT or SENIO??

9 pesos is the minimum fare.
9 * 0.20 = 1.80.
9 - 1.80 = 7.20
Round to 7
Pero sir mas maikli po sya pag ganto.
9 * 0.80 = 7.20
Round to 7

Admin wrote:

Sean Monacillo wrote:Regarding sa tanong ni rheign . Yung WHILE STATEMENT sa loop yun rheign tapos kapag OR LOGIC ang gamit mo lang jan is yung IF STATEMENT . pero pwede ka din naman ata mag OR LOGIC SA WHILE LOOP I guess. di lang ako sure sana masagot ni sir if pwede .  hehehe .

Yes you can incorporate OR in a Loop.

Thank you sir tama na yung nasa isip ko hehehe

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justjoking10 wrote:

Admin wrote:

justjoking10 wrote:

Admin wrote:

justjoking10 wrote:The topic is very well explained sir.

That's good to know from you. Are you sure you understand? Can you give another example?

Pamasahe po s jeep.

if customer is Senior OR Student then
WITH DISCOUNT
else
NO DISCOUNT

Very Good. Ang nagkakagulo ngayon dyan eh yung process after that, diba 20% ang discount so magkano dapat ang binabayad ng STUDENT or SENIO??

9 pesos is the minimum fare.
9 * 0.20 = 1.80.
9 - 1.80 = 7.20
Round to 7
Pero sir mas maikli po sya pag ganto.
9 * 0.80  = 7.20
Round to 7

Yun nga ehh kaso "may mga ilan", na driver na 8 ang singil.

What is the purpose of logic gates?

What is the purpose of logic gates?

althea faye wrote:What is the purpose of logic gates?

It used to create a wider and specific logic. Logic gates can be found in an IC, and a group of IC is a huge contribution to build a computer.

Luwiezz wrote:Thank you for posting this, a big help for me understanding OR logic. I will assure you that I will perform well the next time

it can help a lot for us inspiring programmers .

Ang Boolean expressions ang hindi talaga nawawala pagdating sa programming. Parang yun na din kase yung basis kung pano tatakbo yung program.

iramae wrote:Ang Boolean expressions ang hindi talaga nawawala pagdating sa programming. Parang yun na din kase yung basis kung pano tatakbo yung program.

Yes, in computing its a matter of True or False, On or Off, 1 or 0.

rheigne wrote:The topic is very well explained but sir, naguguluhan lang ako, anong pinagkaiba niya sa While Statement? Yun po kasi ang hindi ko mapagtanto

i think yung while is for looping lang siya

Admin wrote:

justjoking10 wrote:The topic is very well explained sir.

That's good to know from you. Are you sure you understand? Can you give another example?

sir pwede po siguro example po yung sa pag gigitara sir. if gusto po natin matuto mag gitara. dalawang choices po bale its either na hihiram tayo ng gitara OR bibili po ng gitara. it means po kahit san po sa dalawa, matuto ka padin po mga gitara