Conditional Statements

1
Conditional Statements

• ??.??.?????? ???????
• Anan Phonphoem
• http//www.cpe.ku.ac.th/anan
• anan_at_cpe.ku.ac.th

2
Overview

• Relational operators
• Logical operators
• Condition Statements

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Relational Operators
Operator Description Example
Equal S T
Not Equal S T
lt Less than S lt T
gt Greater than S gt T
lt Less than or equal S lt T
gt Greater than or equal S gt T
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Relational Operators

• The comparison result is either
• 0 if false
• 1 if true
• Normally is Array comparison
• Can be used for Array addressing

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Array comparison
gtgtc (a b) c 0 0 1 0
gtgta 1 2 3 4 gtgtb -1 4 3 0
gtgtc (a lt b)
gtgtc (a b) c 1 1 0 1
c 0 1 0 0
gtgtc (a b)
gtgtc (a gt b) c 1 0 1 1
??? c (a b) Error The
expression
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Array addressing
gtgta 1 2 3 4 gtgtb -1 4 3 0
gtgtc a(a lt b)
gtgtc b(a b) c 3
c 2
gtgtc a(a b)
gtgtc b(a gt b) c -1 3 0
c 1 2 4
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More on comparison
gtgt 3 lt 5 ans 1
gtgta 04 a 0 1 2 3 4 gtgtx (sqrt(a)gt1) x
0 1 1 1 1 gtgty a(x) y 1 2 3 4
gtgt a (12 lt 7) a 0
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Logical Operators
Operator Description Example
Logical AND S T
Logical OR S T
Element-wise logical AND S T
Element-wise logical OR S T
Logical NOT S