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What's the meaning of ? this sign in java?
4 Answers
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âŞThe ?: operator in Java
The value of a variable often depends on whether a particular boolean expression is or is not true and on nothing else. For instance one common operation is setting the value of a variable to the maximum of two quantities. In Java you might write:
if( a > b ) {
max = a;
} else {
max = b;
}
Setting a single variable to one of two states based on a single condition is such a common use of 'if-else' that a shortcut has been devised for it, the conditional operator, ?: .
Using the conditional operator you can rewrite the above example in a single line like this:
max = ( a > b ) ? a : b;
( a > b ) ? a : b;Â is an expression which returns one of two values, a or b.
The condition, ( a > b ), is tested.
⢠If it is 'true' the first value, a, is returned.
⢠If it is 'false' , the second value, b, is returned.
Whichever value is returned is dependent on the conditional test, a > b. The condition can be any expression which returns a boolean value.
+ 1
Gysgaça if-else Ĺertli operatorynyĹ gysgaldylan gĂśrnĂźĹi. KĂśp programirleme dilinde gabat gelýär. Men JavaScript we PHP de gabat geldim.
Meselem:
if (a>b) {
// do something
} else {
// do something
}
// Ăokardaky meselemiĹ gysgaldylan gĂśrnĂźĹi.
(a > b) ? a : b
Bu Ă˝erde "?" - simwoly bolsa ":" - bu simwoly bolmasa diĂ˝ip terjime edip alsaĹ dĂźĹnĂźkli bolar, Ă˝agny:
a > b-den uly bolsa ? birzatlar et bolmosa : baĹga zat et.
+ 1
Thank you for explanation
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Now I got it