Kotlin Ranges
Kotlin 范围
With the for loop, you can also create ranges of values with "..":
You can also create ranges of numbers:
Note: The first and last value is included in the range.
Check if a Value Exists
You can also use the in operator to check if a value exists in a range:
例子
val nums = arrayOf(2, 4, 6, 8)
if (2 in nums) {
println("It exists!")
} else {
println("It does not exist.")
}例子
val cars = arrayOf("Volvo", "BMW", "Ford", "Mazda")
if ("Volvo" in cars) {
println("It exists!")
} else {
println("It does not exist.")
} Break or Continue a Range
You can also use the break and continue keywords in a range/for loop:
例子
Stop the loop when nums is equal to 10:
for (nums in 5..15) {
if (nums == 10) {
break
}
println(nums)
} 例子
Skip the value of 10 in the loop, and continue with the next iteration:
for (nums in 5..15) {
if (nums == 10) {
continue
}
println(nums)
} 