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如何判断变量在一个范围内

· One min read

C 家族语言：上界和下界的合取式​

if (x >= 0 && x <= 10) {
    // x is in range of [0, 10]
}

Python：不等式串​

if 0 <= x <= 10:
    # x is in range of [0, 10]

SQL：英语介词 between .. and​

select x from table where x between 0 and 10

Kotlin：英语介词 in ..​

if (x in 0..10) {
    // x is in range of [0, 10]
}

Swift：初学者的模式匹配​

if 0...10 ~= x {
    // x is in range of [0, 10]
}

C#：模式匹配的合取式​

if (x is >= 0 and <= 10) {
    // x is in range of [0, 10]
}

Rust & Swift：模式匹配 Pro​

Rust

if let 0..=10 = x {
    // x is in range of [0, 10]
}

Swift

if case 0...10 = x {
    // x is in range of [0, 10]
}