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The Conditional Operators | Loop and Break

The Conditional Operators

by · February 15, 2013

The conditional operators ? and : are sometimes called ternary operators since they take three arguments. In fact, they form a kind of foreshortened if-then-else. Their general form is,
 
expression 1 ? expression 2 : expression 3
 
What this expression says is: “if expression 1 is true (that is, if its value is non-zero), then the value returned will be expression 2, otherwise the value returned will be expression 3”. Let us understand this with the help of a examples: 

int x, y ;
scanf ( "%d", &x ) ;
y = ( x > 5 ? 3 : 4 ) ;

This statement will store 3 in y if x is greater than 5, otherwise it will store 4 in y.
 
The equivalent if statement will be, 

if ( x > 5 )
y = 3 ;
else
y = 4 ;

char a ;
int y ;
scanf ( "%c", &a ) ;
y = ( a >= 65 && a <= 90 ? 1 : 0 ) ;

Here 1 would be assigned to y if a >=65 && a <=90 evaluates to true, otherwise 0 would be assigned.

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