字符串大小寫(xiě)敏感比較

在許多編程語(yǔ)言中，字符串大小寫(xiě)敏感比較是根據(jù)字符的Unicode編碼值進(jìn)行的。這意味著大寫(xiě)字母和小寫(xiě)字母被視為不同的字符。以下是一些常見(jiàn)編程語(yǔ)言中字符串大小寫(xiě)敏感比較的例子：

1. Python：

s1 = "Hello"
s2 = "hello"

if s1 == s2:
    print("Strings are equal")
else:
    print("Strings are not equal")  # 輸出：Strings are not equal

2. Java：

String s1 = "Hello";
String s2 = "hello";

if (s1.equals(s2)) {
    System.out.println("Strings are equal");
} else {
    System.out.println("Strings are not equal");  // 輸出：Strings are not equal
}

3. JavaScript：

let s1 = "Hello";
let s2 = "hello";

if (s1 === s2) {
    console.log("Strings are equal");
} else {
    console.log("Strings are not equal");  // 輸出：Strings are not equal
}

在這些例子中，我們可以看到字符串"Hello"和"hello"被視為不相等的，因?yàn)樗鼈兊拇笮?xiě)不同。如果你需要進(jìn)行大小寫(xiě)不敏感的比較，可以在比較之前將字符串轉(zhuǎn)換為全小寫(xiě)或全大寫(xiě)：

1. Python：

s1 = "Hello"
s2 = "hello"

if s1.lower() == s2.lower():
    print("Strings are equal (case-insensitive)")  # 輸出：Strings are equal (case-insensitive)
else:
    print("Strings are not equal")

2. Java：

String s1 = "Hello";
String s2 = "hello";

if (s1.equalsIgnoreCase(s2)) {
    System.out.println("Strings are equal (case-insensitive)");  // 輸出：Strings are equal (case-insensitive)
} else {
    System.out.println("Strings are not equal");
}

3. JavaScript：

let s1 = "Hello";
let s2 = "hello";

if (s1.toLowerCase() === s2.toLowerCase()) {
    console.log("Strings are equal (case-insensitive)");  // 輸出：Strings are equal (case-insensitive)
} else {
    console.log("Strings are not equal");
}