JAVA 2010 08 Outline Scanner Input Shorthand Operators

JAVA 2010. 08

Outline • • • Scanner Input 練習 Shorthand Operators Increment and Decrement Operators boolean Data Type if statement

練習: 1. 以Scanner 輸入兩整數 存到變數 num 1、num 2 2. 印出 num 1 + num 2 num 1 / num 2

Shorthand Operators Operator Name += Addition assignment -= Subtraction assignment *= Multiplication assignment /= Division assignment %= Remainder assignment Example Equivalent i += 8 i=i+8 i -= 8 i=i-8 i *= 8 i=i*8 i /= 8 i=i/8 i %= 8 i=i%8

Increment and Decrement Operators Operator ++var var++ --var var-- Name Description 先新增 var + 1 使用新值 後新增 var + 1 使用原值 先減少 var - 1 使用新值 後減少 var - 1 使用原值 Example (assume i=1) int j = ++i; // j=2 , i=2 int j = i++; // j=1 , i=2 int j = --i; // j=0 , i=0 int j = i--; // j=1 , i=0

if statement if 判斷式 true Statement for true false

if else statement true if false 判斷式 Statement for true Statement for false

程式: ifprogram. java