Conditional operator ( ? )
The conditional operator evaluates an expression returning a value if that expression is true and a different one if
the expression is evaluated as false. Its format is:
condition ? result1 : result2
If condition is true the expression will return result1, if it is not it will return result2.
7==5 ? 4 : 3 // returns 3, since 7 is not equal to 5.
7==5+2 ? 4 : 3 // returns 4, since 7 is equal to 5+2.
5>3 ? a : b // returns the value of a, since 5 is greater than 3.
a>b ? a : b // returns whichever is greater, a or b.
// conditional operator
#include <iostream>
using namespace std;
int main ()
{
int a,b,c;
a=2;
b=7;
c = (a>b) ? a : b;
cout << c;
return 0;
}
7
In this example a was 2 and b was 7, so the expression being evaluated (a>b) was not true, thus the first value
specified after the question mark was discarded in favor of the second value (the one after the colon) which was b,
with a value of 7.
The conditional operator evaluates an expression returning a value if that expression is true and a different one if
the expression is evaluated as false. Its format is:
condition ? result1 : result2
If condition is true the expression will return result1, if it is not it will return result2.
7==5 ? 4 : 3 // returns 3, since 7 is not equal to 5.
7==5+2 ? 4 : 3 // returns 4, since 7 is equal to 5+2.
5>3 ? a : b // returns the value of a, since 5 is greater than 3.
a>b ? a : b // returns whichever is greater, a or b.
// conditional operator
#include <iostream>
using namespace std;
int main ()
{
int a,b,c;
a=2;
b=7;
c = (a>b) ? a : b;
cout << c;
return 0;
}
7
In this example a was 2 and b was 7, so the expression being evaluated (a>b) was not true, thus the first value
specified after the question mark was discarded in favor of the second value (the one after the colon) which was b,
with a value of 7.