StartsWith() with an array of strings-CodePudding

Let's say I have an array of strings:

string[] greeting = new string[] {"hey", "hello", "hi"};

if the user input is any of the following words: "hey" "hello" "hi" then I want the console to print "hey there". This is what I did:

 string userInput = Console.ReadLine();

 bool result_a = userInput.StartsWith(greeting);

 if(result_a) { Console.WriteLine("hey there"); }

but that doesn't seem to be working.

CodePudding user response：

If what you want is, whenever the user starts with any of the 3

using System;
using System.Linq;

...

         string[] greeting = new string[] {"hey", "hello", "hi"};
         string userInput = Console.ReadLine();         
         bool result_a = greeting.Any(a => userInput.Trim().StartsWith(a));
         if(result_a) { Console.WriteLine("hey there"); }

Example: "hi my name is Ali"

Now if you want capital letters to work as well you need to change the line to:

Example: "Hi my name is Ali"

bool result_a = greeting.Any(a => userInput.Trim().ToLower().StartsWith(a));

If what you want is, whenever the user input contains then:

using System;
using System.Linq;

...

         string[] greeting = new string[] {"hey", "hello", "hi"};
         string userInput = Console.ReadLine();         
         bool result_a = greeting.Any(a => userInput.Trim().Contains(a));
         if(result_a) { Console.WriteLine("hey there"); }

Example: "Good morning! hello"

Now if you want capital letters to work as well you need to change the line to:

Example: "Good morning! Hello"

bool result_a = greeting.Any(a => userInput.Trim().ToLower().Contains(a));

CodePudding user response：

string[] greeting = new string[] { "hey", "hello", "hi" };
string userInput = Console.ReadLine();

bool result_a = greeting.Any(x=>x.StartsWith(userInput));

if (result_a) { Console.WriteLine("hey there"); }
if (result_a) { Console.WriteLine($"{greeting.FirstOrDefault(x => x.StartsWith(userInput))} there"); }

CodePudding user response：

try this,bro

        List<string> greeting = new List<string>(); 
        greeting.Add("hey");
        greeting.Add("hello");
        greeting.Add("hi");
        string userInput = Console.ReadLine();

        if (greeting.Contains(userInput.Trim()))
        {
            Console.WriteLine("hey there");
        }