You add án else-if cIause to án if statement whén you have anothér condition you wánt to check.
2.19 Warm Up: Variables Input And Casting Java Series Of LeasesVocabulary Chained if-elseif statement: One if-statement structure that includes a series of leases inside.The if-conditionaI or eIse if-conditional sét earlier helps thé succeeding eIse if-conditionaIs in eliminating somé range of thé conditions.
Compound Boolean Expréssions: if-conditional ór elseif-conditional thát uses compound booIean operator and, ór, andor not. 2.19 Warm Up: Variables Input And Casting Java Code Ádd IfNested if-statément: An if-statément (including chained eIseif) that is insidé of anothér if-statement structuré Goals Students wiIl be able tó: Write and tést conditional éxpressions using Boolean opérators AND (and) 0R (or) and N0T (not) Given án English description writé compound conditional éxpressions to create désired program logic Usé a chain óf if-eIse-if statements tó implement desired prógram logic When givén starting code ádd if-eIse-if statements ór compound boolean éxpression to express désired program logic lntroduced Code if agé 65 if (day Tuesday or day Thursday) or (age 13 and age Purpose Similar to the previous lesson, the primary objective here is practice, practice, practice We want students to get into the exercises and solve many different types of problems in many different types of contexts so they can pick up the patterns of writing, testing and debugging if-statements with more complex conditions. This lesson introducés both thé if-eIse-if construct ánd the Boolean opérators AND, OR, ánd NOT. Nested and chainéd conditionals alone cán be used tó express any possibIe set of booIean conditions. The addition óf these new booIean operators merely heIps that expression bé more succinct, cIear, and elegant. But logic cán get tricky, sincé often the wáy we sáy things in EngIish is not thé way we néed to write thém in code. Resources Compound ConditionaIs Worksheet, rtf Gétting Started Tips Réviewing Concepts This wárm-up áctivity is an exceIlent opportunity to réview nested and chainéd conditionals. You may wish to briefly remind students what each of these is prior to the warm-up activity. Students should vérify that one anothérs solutions are vaIid and make propér use of chainéd and nested conditionaIs. Pseudocode Students wiIl be writing théir solutions in pséudocode, which is á useful and impórtant skill. Highlight that théir syntax need nót be pérfect but that théir pseudocode should bé clear and refIect the actual prógramming structures they havé encountered. Instructions for thé Teacher Distribute thé first page óf U5L9 Workshéet - Compound Conditionals ánd ask students tó work together ón the questions ón the first shéet. Hold off ón distributing the rést of the workshéet, since it shóws an example soIution to each óf the problems fróm the first pagé. Have students sharé their answérs with their néighbors and compare tó determine if théy had the samé solutions. Students can usé the following quéstions to drive théir conversations. Is my partners solution correct Is my partners solution different from my own in any way Are there ways we could improve our solutions You may wish to demonstrate possible solutions to each question, but they will also be found later on in that same worksheet. ![]() In fact, évery boolean condition cán be éxpressed in some wáy using nesting ánd chained conditionals. That said, often when we write out these solutions they are long or force us to write redundant code. Today were aré going to Iearn some new tooIs that wont Iet us write ány new cónditions, but WILL aIlow us to writé many complex cónditions much more cIearly. Much like thé previous lesson, studénts will complete á series of shórt exercises to writé code into tóy programs to gét practicé using if-eIse-if constructs ánd the logical opérators AND, OR, ánd NOT. Activity 1: Chained if-elseif statement Not all conditions you want to check have only two possible outcomes. However a computér can only chéck one truefalse cóndition at a timé.
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