Program to accept String starting with Capital letter

Given a string str consisting of alphabets, the task is to check whether the given string is starting with a Capital Letter or Not.
Examples:

Input: str = “GeeksforGeeks”
Output: Accepted

Input: str = “geeksforgeeks”
Output: Not Accepted 

Approach:

• Find the ASCII value of the first character of the string 
• Check if this value lies in the range of [65, 90] or not 
• If yes, print Accepted
• Else print Not Accepted 

Below is the implementation of the above approach:

C++

// C++ program to accept String
// starting with Capital letter

#include <iostream>
using namespace std;

// Function to check if first
// character is Capital
int checkIfStartsWithCapital(string str)
{

    if (str[0] >= 'A' && str[0] <= 'Z')
        return 1;
    else
        return 0;
}

// Function to check
void check(string str)
{
    if (checkIfStartsWithCapital(str))
        cout << "Accepted\n";
    else
        cout << "Not Accepted\n";
}

// Driver function
int main()
{
    string str = "GeeksforGeeks";
    check(str);

    str = "geeksforgeeks";
    check(str);

    return 0;
}

Java

// Java program to accept String
// starting with Capital letter
class GFG {

    // Function to check if first
    // character is Capital
    static int checkIfStartsWithCapital(String str)
    {

        if (str.charAt(0) >= 'A' && str.charAt(0) <= 'Z')
            return 1;
        else
            return 0;
    }

    // Function to check
    static void check(String str)
    {
        if (checkIfStartsWithCapital(str) == 1)
            System.out.println("Accepted");
        else
            System.out.println("Not Accepted");
    }

    // Driver function
    public static void main(String[] args)
    {
        String str = "GeeksforGeeks";
        check(str);

        str = "geeksforgeeks";
        check(str);
    }
}

// This code is contributed by AnkitRai01

Python3

# Python3 program to accept String
# starting with Capital letter

# Function to check if first
# character is Capital


def checkIfStartsWithCapital(string):

    if (string[0] >= 'A' and string[0] <= 'Z'):
        return 1
    else:
        return 0

# Function to check


def check(string):

    if (checkIfStartsWithCapital(string)):
        print("Accepted")
    else:
        print("Not Accepted")


# Driver function
if __name__ == "__main__":

    string = "GeeksforGeeks"
    check(string)

    string = "geeksforgeeks"
    check(string)

# This code is contributed by AnkitRai01

C#

// C# program to accept String
// starting with Capital letter
using System;

class GFG {

    // Function to check if first
    // character is Capital
    static int checkIfStartsWithCapital(string str)
    {

        if (str[0] >= 'A' && str[0] <= 'Z')
            return 1;
        else
            return 0;
    }

    // Function to check
    static void check(string str)
    {
        if (checkIfStartsWithCapital(str) == 1)
            Console.WriteLine("Accepted");
        else
            Console.WriteLine("Not Accepted");
    }

    // Driver function
    public static void Main()
    {
        string str = "GeeksforGeeks";
        check(str);

        str = "geeksforgeeks";
        check(str);
    }
}

// This code is contributed by AnkitRai01

Javascript

<script>


// JavaScript program to accept String
// starting with Capital letter

// Function to check if first
// character is Capital
function checkIfStartsWithCapital(str)
{

    if (str[0] >= 'A' && str[0] <= 'Z')
        return 1;
    else
        return 0;
}

// Function to check
function check(str)
{
    if (checkIfStartsWithCapital(str))
        document.write( "Accepted<br>");
    else
        document.write( "Not Accepted<br>");
}

// Driver function

var str = "GeeksforGeeks";
check(str);
str= "geeksforgeeks";
check(str);


</script>

Output:

Accepted
Not Accepted

Time complexity: O(1)
Auxiliary space: O(1)