Boolean Operations In A Programming Language
Gbogbo ọrọ náà
Read this out loud: staff may enter, and so may students who have paid. Now try to write it as one condition. Where do the brackets go? Does a member of staff who has not paid get in? English lets a rule stay comfortably vague until somebody has to enforce it; a program cannot. Three small words, NOT, AND and OR, are what turn a sentence like that into something a machine can decide.
This lesson covers the three Boolean operations the specification names, the truth tables that define them exactly, and the combinations of them that appear inside real conditions. You will learn the order the operations are carried out in, why a bracket can silently change who is allowed through a door, how to turn a condition inside out when you need its opposite, and the two compound conditions that beginners write which look right and are always true or always false.
Ebumnobi
- Be familiar with and be able to use:
- NOT
- AND
- OR.
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Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Boolean Operations In A Programming Language. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- A holds True and B holds False. What is the value of A AND B? A. False B. True C. It depends on the language D. The expression is invalid Answer: A
- Which condition correctly tests that a number is between 10 and 20 inclusive? A. N > 10 AND N < 20 B. N ≥ 10 AND N ≤ 20 C. N ≥ 10 OR N ≤ 20 D. N > 10 OR N < 20 Answer: B
- In the expression A OR B AND C, which operation is carried out first? A. AND B. OR C. They are carried out left to right D. It is undefined Answer: A
- What is the exact opposite of the condition A AND B? A. NOT A AND NOT B B. NOT A OR NOT B C. A OR B D. NOT (A OR B) Answer: B
- A programmer writes IF Choice = "Y" AND Choice = "N" THEN. What happens? A. The block runs whenever Choice is Y B. The block runs whenever Choice is N C. The block never runs D. The block always runs Answer: C
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