C# | Convert.ToSingle(String, IFormatProvider) Method
Last Updated :
11 Jul, 2025
This method is used to converts the specified string representation of a number to an equivalent single-precision floating-point number, using the specified culture-specific formatting information.
Syntax:
public static float ToSingle (string value, IFormatProvider provider);
Parameters:
- value: It is a string that contains the number to convert.
- provider: It is an object that supplies culture-specific formatting information.
Return Value: This method returns a single-precision floating-point number that is equivalent to the number in value, or 0 (zero) if value is null.
Exceptions:
- FormatException: If the value does not consist of an optional sign followed by a sequence of digits (0 through 9).
- OverFlowException: If the value represents a number that is less than MinValue or greater than MaxValue.
Below programs illustrate the use of Convert.ToSingle(String, IFormatProvider) Method:
Example 1:
csharp
// C# program to demonstrate the
// Convert.ToSingle() Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of CultureInfo
CultureInfo cultures = new CultureInfo("en-US");
// declaring and initializing String array
string[] values = {"123.45", "+12.345",
"-1234.5"};
// calling get() Method
Console.Write("Converted float value"
+ " from a specified string ");
for (int j = 0; j < values.Length; j++)
{
get(values[j], cultures);
}
}
catch (FormatException e)
{
Console.WriteLine("\n");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (OverflowException e)
{
Console.WriteLine("\n");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s,
CultureInfo cultures)
{
// converting string to specified float
float val = Convert.ToSingle(s, cultures);
// display the converted float value
Console.Write(" {0}, ", val);
}
}
OutputConverted float value from a specified string 123.45, 12.345, -1234.5,
Example 2: For FormatException
csharp
// C# program to demonstrate the
// Convert.ToSingle() Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of CultureInfo
CultureInfo cultures = new CultureInfo("en-US");
// declaring and initializing String array
string[] values = {"12.345", "+1234.5",
"-123.45"};
// calling get() Method
Console.Write("Converted float value"
+ " of specified strings: ");
for (int j = 0; j < values.Length; j++)
{
get(values[j], cultures);
}
Console.WriteLine("\n");
string s = "123 456, 789";
Console.WriteLine("format of s is invalid ");
// converting string to specified float
float val = Convert.ToSingle(s, cultures);
// display the converted float value
Console.Write(" {0}, ", val);
}
catch (FormatException e)
{
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (OverflowException e)
{
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s,
CultureInfo cultures)
{
// converting string to
// specified float value
float val = Convert.ToSingle(s, cultures);
// display the converted
// float value
Console.Write(" {0}, ", val);
}
}
Output: Converted float value of specified strings: 12.345, 1234.5, -123.45,
format of s is invalid
Exception Thrown: System.FormatException
Reference:
