/* 変数の宣言 varは変数、letは定数 */ var myVar = 42 myVar = 50 let myConst = 42 // myConst = 50 // error: cannot assign to value: 'myConst' is a 'let' constant print("Hello, world!") print("myVar = \(myVar), myConst = \(myConst)")
/* 変数の宣言 varは変数、letは定数 */ var myVar = 42 myVar = 50 let myConst = 42 // myConst = 50 // error: cannot assign to value: 'myConst' is a 'let' constant print("Hello, world!") print("myVar = \(myVar), myConst = \(myConst)")