objective c - What is this short function doing ? (_bird.physicsBody.velocity.dy < 0 ? 0.003 : 0.001) -

objective c - What is this short function doing ? (_bird.physicsBody.velocity.dy < 0 ? 0.003 : 0.001) -

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what question mark , colon (?: ternary operator) mean in objective-c? 10 answers

i studying code noticed next function.

obviously, short form of something, have never come across this.

what < 0 ? 0.003 : 0.001 ? can explain in plain english? give thanks you.

(_bird.physicsbody.velocity.dy < 0 ? 0.003 : 0.001)

this code:

(_bird.physicsbody.velocity.dy < 0 ? 0.003 : 0.001)

is same as:

if (_bird.physicsbody.velocity.dv < 0) { homecoming 0.003; } else { homecoming 0.001; }

objective-c