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Making decision and repeating in PHP
The document discusses various programming concepts related to decision making and repetition in code including understanding true and false values, using if/elseif/else statements, equality and relational operators, logical operators, and using while and for loops to repeat code. Specific topics covered include evaluating booleans, making single and multi-line if statements, comparing different data types, negation, and printing select menus with loops.
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Making decision and repeating in PHP
- 1.Making Decision andRepeatingYourselfUnderstanding True and FalseMaking DecisionsBuilding Complicated DecisionsRepeating Yourself
- 2.Understanding True andFalse• All integers and floating point except 0 and 0.0 are true• All strings are true except two strings:• String containing nothing at all(“ ”)• String containing only character 0(“0”)• An empty array is also evaluated as false
- 3.Making Decisions• Makinga decision with if( )• Multiple statements in an if( ) code block• Using else with if( )• Using elseif( )• elseif( ) with else
- 4.Making a decisionwith if( )
- 6.Multiple statements inan if( ) code block
- 8.Using else withif( )
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- 12.elseif( ) withelse
- 14.Building Complicated Decisions•The equality operator• The not-equals operator• Less-than and greater-than• Comparing floating-point numbers• Comparing strings• Comparing numbers and strings• Comparing strings with strcmp( )• Using the negation operator• Negation operator• Logical operators
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- 25.Comparing numbers andstrings
- 33.Comparing strings withstrcmp( )
- 41.Using the negationoperator
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- 47.Repeating Yourself• Printinga <select> menu with while( )• Printing a <select> menu with for( )• Multiple expressions in for( )
- 48.Printing a <select>menu with while( )
- 50.Printing a <select>menu with for( )
- 52.Multiple expressions infor( )