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Comp Sci: y = (x >= 0 ? x : -x); what does it mean?
This is an abbreviated form of an if-else statement, but I can't figure out what it is. The question mark is throwing me off.
Choices:
A. if (x >= 0) y = x;
B. if (x >= 0) y = x; else y = -x;
C. if (x >= 0) y = -x;
D. if (x >= 0) y = -x; else y = x;
I'm almost positive it's B, but can someone please reassure me?
3 Answers
- Anonymous8 years ago
It's a short hand if that returns a value. Here is the long version:
if (x >= 0) {
....y = x;
} else {
....y = -x;
}
It's like Ben said, the first value after the question mark is the value if the condition is true; otherwise the other value is used.
- ?Lv 58 years ago
if x value greater or equals 0 the store x value to y, otherwise store -x value to y
- BenLv 78 years ago
The ternary expression is (condition) ? (value-if-true) : (value-if-false). So yes, b is the correct answer.
