_CAST

The _CAST pseudo-function performs a C-like cast of a numerical value to a specified numerical type.

Syntax

result = _CAST(numericalType, numericalValue)

Parameters

• numericalType specifies the target type for the conversion.
  • Accepted types are:
    • SINGLE
    • DOUBLE
    • _FLOAT
    • _BYTE
    • INTEGER
    • LONG
    • _INTEGER64
    • _OFFSET
  • The _UNSIGNED modifier is also allowed.
• numericalValue is the value to be cast to the specified type.

Description

• _CAST allows explicit type conversion, similar to C-style casting.
• _CAST does not round the value like INT, _ROUND, CINT, or CLNG.
• The return type is determined by numericalType.
• A compiler error is thrown if numericalType is invalid or numericalValue is a STRING.
• No runtime errors are thrown if numericalType and numericalValue are valid.

Availability

• 

  none

• 

  v4.0.0

• 
• 

  yes

• 

  yes

• 

  yes

Examples

Example 1

Basic type conversion.

DIM a AS DOUBLE DIM b AS _INTEGER64 a = 123.456 b = _CAST(_INTEGER64, a) PRINT "Original: "; a PRINT "Casted: "; b a = 456.789 b = _CAST(_INTEGER64, a) PRINT "Original: "; a PRINT "Casted: "; b a = -123.456 b = _CAST(_INTEGER64, a) PRINT "Original: "; a PRINT "Casted: "; b a = -456.789 b = _CAST(_INTEGER64, a) PRINT "Original: "; a PRINT "Casted: "; b

Original: 123.456 Casted: 123 Original: 456.789 Casted: 456 Original: -123.456 Casted: -123 Original: -456.789 Casted: -456

Example 2

Type conversion function comparison.

PRINT 4.6!; INT(4.6!); FIX(4.6!); CLNG(4.6!); _ROUND(4.6!); _CAST(LONG, 4.6!) PRINT -4.6!; INT(-4.6!); FIX(-4.6!); CLNG(-4.6!); _ROUND(-4.6!); _CAST(LONG, -4.6!) PRINT 1%%; _CAST(_UNSIGNED _BYTE, 1%%) PRINT -1%%; _CAST(_UNSIGNED _BYTE, -1%%)

4.6 4 4 5 5 4 -4.6 -5 -4 -5 -5 -4 1 1 -1 255

See also

• _CEIL
• INT, FIX
• CINT, CLNG,
• CSNG, CDBL
• _ROUND
• Variable Types
• Keyword Reference - Alphabetical
• Keyword Reference - By usage

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