How to call another function within an Azure function

using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;

public static class MyFunctions
{
    [FunctionName("FunctionA")]
    public static async Task RunFunctionA(
        [HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req,
        ExecutionContext context,
        ILogger log)
    {
        // Your logic for FunctionA
        
        // Call FunctionB
        await RunFunctionB(req, context, log);
        
        // Continue with FunctionA logic or return a response
        return new OkResult();
    }

    [FunctionName("FunctionB")]
    public static async Task RunFunctionB(
        HttpRequest req,
        ExecutionContext context,
        ILogger log)
    {
        // Your logic for FunctionB
    }
}

In Azure Function Apps using C#, you can call one function from another function within the same Function App. You can achieve this by using either a direct method call or by triggering the second function as an HTTP request.Example of calling direct function 

public static class MyFunctions
{
    [FunctionName("Function1")]
    public static void RunFunction1([TimerTrigger("0 */5 * * * *")] TimerInfo myTimer, ILogger log)
    {
        // Function1 logic here

        // Call Function2
        Function2();
    }

    public static void Function2()
    {
        // Function2 logic here
    }
}
Function1 is a TimerTrigger function that gets triggered every 5 minutes. Inside Function1, we call Function2 directly.