If

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#if

Preprocessor conditional directive

Syntax

#if (expression)
' Conditionally included statements
#endif

Description

Conditionally includes statements at compile time.

Statements contained within the #if / #endif block are included if expression evaluates to True (non-zero) and excluded (ignored) if expression evaluates to False (0).

This conditional directive differs from the If conditional statement in that #if is evaluated at compile-time and If is evaluated at run-time.

Remarks

Differences from QB

• New to FreeBASIC

See also

• #define
• #macro
• #else
• #elseif
• #elseifdef
• #elseifndef
• #endif
• #ifdef
• #ifndef
• #undef
• defined
• #assert

Examples

#define DEBUG_LEVEL 1

#if (DEBUG_LEVEL >= 2)

  ' This line is not compiled since the expression is False

  Print "Starting application"

#endif

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Category: Preprocessor
Kind: keyword

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Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.