Different ways to convert String to Integer in C#

In C#, we can convert a string to an integer using various methods. This process is common when dealing with user input or data parsing. In this article, we will learn Different ways to convert String to Integer in C#.

Example:

Input String: "10"
Output String: 10
Explanation: The input string "10" is converted to the output integer 10, allowing it to be used in numerical operations.

Syntax

Int32.Parse()                                                          # Parse Method
TryParse()                                                              # TryParse Method
Convert.ToInt32()                                                 # Convert Method

Using the Parse Method

The Int32.Parse() method converts a string representation of a number to its 32-bit signed integer equivalent.

Syntax

int length = Int32.Parse(string);

Example:

using System;

namespace GeeksforGeeks {
    class GFG {
        public static void Main(string[] args) {
            string l = "10";
            int length = Int32.Parse(l);
            Console.WriteLine("Converted: {0}", length);
        }
    }
}

Converted: 10

Using the TryParse Method

The TryParse() method attempts to convert a string to an integer without throwing an exception if the conversion fails. It returns a boolean indicating success or failure.

Syntax

bool success = Int32.TryParse(string, out int result);

Example:

using System;
namespace GeeksforGeeks {
    class GFG {
        public static void Main(string[] args) {
            string l = "10";
            int length;

            // Attempt to parse the string
            bool success = Int32.TryParse(l, out length);
            if (success) {
                Console.WriteLine("Converted: {0}", length);
            } else {
                Console.WriteLine("Failed.");
            }
        }
    }
}

Converted: 10

Using the Convert Method

The Convert.ToInt32() method converts a specified value to a 32-bit signed integer. It handles null values gracefully.

Syntax

int length = Convert.ToInt32(string);

using System;
namespace GeeksforGeeks {
    class GFG {
        public static void Main(string[] args) {
            string l = "10";
            int length = Convert.ToInt32(l);
            Console.WriteLine("Converted: {0}", length);
        }
    }
}

Converted: 10

Conclusion

In C#, converting a string to an integer can be done using the Parse, TryParse, or Convert.ToInt32 methods. Each method has its use case and handling for various input scenarios, allowing developers to choose the most appropriate one for their needs.