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Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Feb 21, 2002

Boolean Conversion


Numeric values and pointers are implicitly converted to a Boolean value in conditional expressions. For example:
 
void *p = get_ptr();
if(p)
{
 // process p
}

A zero value evaluates as false. All other values evaluate as true. Note that negative values also evaluate as true.
Danny Kalev
 
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