从string db2获取子字符串

# 获取从索引2开始到索引5（不包括）的子字符串
substring = "string db2".substring(2, 5)
print(substring)  # 输出: ring

// 获取从索引2开始到索引5（不包括）的子字符串
let substring = "string db2".substring(2, 5);
console.log(substring);  // 输出: ring

// 获取从索引2开始到索引5（不包括）的子字符串
String substring = "string db2".substring(2, 5);
System.out.println(substring);  // 输出: ring

// 获取从索引2开始到索引5（不包括）的子字符串
string substring = "string db2".Substring(2, 3);
Console.WriteLine(substring);  // 输出: ring

s = "string db2"
start_index = 2
end_index = 5

if start_index < len(s) and end_index <= len(s):
    substring = s[start_index:end_index]
    print(substring)
else:
    print("索引越界")