初三_綜合科技應用_if判斷式_練習

Python語言中使用以下哪一個符號來表示開始一個程式區塊？

• :

• !

• #

• /

Answer explanation

In Python, the symbol ':' is used to indicate the beginning of a code block. It is the correct choice for starting a program block.

「if 條件式:」的敘述中，下列哪一項正確？

• 當條件式為False時，就會執行程式區塊的敘述

• 當條件式為True時，就會執行程式區塊的敘述

• 當條件式改變時，就會執行程式區塊的敘述

• 當發生錯誤時，就會執行程式區塊的敘述

Answer explanation

The correct answer is 'When the condition is True, the statements in the code block will be executed.'

「if...elif...else」條件式中，如果所有條件式都是False，則執行下列哪一程式區塊？

• if

• elif

• else

• 不會執行程式區塊的敘述

Answer explanation

In the 'if...elif...else' conditional statement, if all conditions are False, the program will execute the 'else' block. It is the correct choice when none of the previous conditions are met.

「if...else...」條件式的敘述中，下列哪一項正確？

• 條件式只可使用關係運算式（關係運算式即是比較運算式）

• 條件式只可使用邏輯運算式

• 當條件可以是關係運算式，也可以是邏輯運算式

• 以上皆不正確

Answer explanation

The 'if...else...' statement can have conditions that are either relational expressions or logical expressions. Therefore, the correct answer is 'When the condition can be either a relational expression or a logical expression'.

變數a的值為3，執行下列程式後顯示的結果為何？

• 1

• 2

• 12

• 不顯示任何內容

Answer explanation

The value of variable a is 3. The program will display the number 2 as the result because it is the correct answer choice.

變數a的值為5，執行下列程式後顯示的結果為何？

• 1

• 2

• 12

• 不顯示任何內容

Answer explanation

The value of variable a is 5. The program will display 1 as the result because it is the correct answer choice.

變數a的值為4，執行下列程式後顯示的結果為何？

• 1

• 2

• 3

• 123

Answer explanation

The value of variable a is 4. The program will display the number 3 as the result because it is the correct answer choice.

變數a的值為20000，執行下列程式後顯示的結果為何？

• 10000.0 元

• 16000.0元

• 18000.0 元

• 20000.0 元

Answer explanation

The value of variable a is 20000. The program will display 18000.0元 as the result, which is the correct choice.

變數a=3, b=7，執行下列程式後顯示的結果為何？

• 3

• 7

• 37

• 不顯示任何內容

Answer explanation

The program will display the value of variable 'a', which is 3. This is the correct choice.

變數a=3, b=7, 執行下列程式後顯示的結果為何？

• 3

• 7

• 37

• 不顯示任何內容

Answer explanation

The program will display the value of variable b, which is 7. Therefore, the correct answer is 7.