Control Structures.pptx

Control Structures.pptx - Week 9 Control Structures What is...

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Control Structures Week 9
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What is a control structure? A control structure is a block of programming that analyzes variables and chooses a direction in which to go based on given parameters. The 3 basic types of control structure are: Sequential Selection Repetition (Iteration)
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Control structures
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Sequential Control Structure The default control structure Example: Input number between 1 and 10; Input second number between 11 and 20; Add first number to second number; Statements are executed line by line, in the order that they appear
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Selection Control Structure Selection is used to test a condition Then a sequence of statements is executed based on whether the condition is true or false The program has to choose between 2 or more alternative paths
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Selection Control Structure cont.. Example If age1 is greater than age2; Then print “Age1 is greater than Age2” There are 4 main types of selection structure: if statement -
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