条件语句

src/basic/Choice.kt

@@ -0,0 +1,47 @@
+package basic
+
+/**
+ * 选择语句
+ */
+
+fun main(args: Array<String>) {
+
+    // if语句
+    var a: Int = 51
+    var b: Int = 6
+    if (a < b) {
+        println("a<b")
+    } else {
+        println("a>b")
+    }
+
+    // 三元运算
+    var c: Int = 0
+    c = if (a > b) a else b
+    println(c)
+
+    // else if
+    if (a > b) {
+        println("a>b")
+    } else if (a > b) {
+        println("a<b")
+    }
+
+    // when
+    var d: Int = 4
+    var e: Int = 4
+    when (d) {
+        1 -> println(1)
+        2 -> println(2)
+        3, 4, 5, 6, 7 -> println("3..7")
+        else -> {
+            println("other1")
+            println("other2")
+        }
+    }
+
+    when {
+        d == e -> println("d == e")
+        else -> println("else")
+    }
+}