More on String Functions

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More on String Functions
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ASCII Codes

• The computer stores individual characters as
  numbers.
• The numbering system is called American Standard
  Code for Information Interchange (ASCII).
• Numbers 0 255 are used.

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CHR( )

• CHR(number) gives the character represented by
  the ASCII code number in the parentheses.
• Examples
• PRINT CHR(34) gives you output of
• PRINT CHR(65) will print A
• PRINT CHR(33) prints ! 

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ASC( )

• ASC(Some) gives the ASCII code of the first
  letter of Some.
• Examples
• PRINT ASC(M) gives you output of 77.
• PRINT ASC(Mom) is also 77.
• PRINT ASC(!) prints 33. 

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 STR( )

• STR( ) converts numbers to strings.
• Examples
• STR(36.8) is the string 36.8.
• STR(Year) is the string 2000.

Notice the single blank space left before a
number!
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Sample Program

• STR( ) changes a number into a string so it can
  be manipulated with string functions.

Year 2001 Year STR(Year) PRINT Seniors are
the class of PRINT RIGHT(Year,2)
Seniors are the class of 01
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VAL( )

• VAL( ) converts a string to a number.
• Examples
• PRINT VAL(321) 2 prints 642.
• VAL(23KIDOO) is the number 23.
• VAL(Antelope) is equal to 0.

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Sample Program

• VAL( ) changes the numeric portion of a string
  into a number so it can be used in an arithmetic
  expression.

Team Phoenix...Suns......19.7 Wins
VAL(MID(Team, 21,2)) Losses
VAL(RIGHT(TEAM,2)) PRINT Suns won
Wins-Losses PRINT more games than they lost. 
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Notes

• ASC( ) VAL ( ) can only have strings within the
  parentheses.
• ASC( ) VAL( ) represent numbers.
• CHR( ) STR( ) can only have numbers within
  the parentheses.
• CHR( ) STR( ) represent strings.

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That was a lot of information