删除字符串中的所有空格

def remove_spaces(s):
    return s.replace(" ", "")

# 示例
input_str = "Hello World"
output_str = remove_spaces(input_str)
print(output_str)  # 输出: HelloWorld

function removeSpaces(str) {
    return str.replace(/\s+/g, '');
}

// 示例
let inputStr = "Hello World";
let outputStr = removeSpaces(inputStr);
console.log(outputStr);  // 输出: HelloWorld

public class RemoveSpaces {
    public static String removeSpaces(String s) {
        return s.replaceAll("\\s+", "");
    }

    public static void main(String[] args) {
        String inputStr = "Hello World";
        String outputStr = removeSpaces(inputStr);
        System.out.println(outputStr);  // 输出: HelloWorld
    }
}