How do I convert a string to double using input? [duplicate]

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-2

This question already has an answer here:

Converting string to double in C#

5 answers

I want to ask a user to input a number in a string type (because that's the only way in C#) and then convert it into a double type.

private static string InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Convert.ToDouble(Console.ReadLine());

}

I hope anyone has a solution for this.

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

asked Jan 3 at 10:07

Rammah

102

marked as duplicate by Uwe Keim, Kirk Larkin, HimBromBeere, mason c#
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Jan 3 at 15:02

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

5

Your method should return double

– Backs
Jan 3 at 10:08

1

What is problem? (other than: your method should return double).

– isaeid
Jan 3 at 10:12

1

Ohh lol, didn't see that -_- thanks!

– Rammah
Jan 3 at 10:12

Remember to catch exceptions like FormatException for example.

– Valentin P
Jan 3 at 10:14

@ValentinP Which is a really bad appraoch to prevent whrongly formatted input from being parsed. Better would be using TryParse. Don´t catch exceptions when you can avoid them in the first place.

– HimBromBeere
Jan 3 at 10:15

|
show 1 more comment

-2

This question already has an answer here:

Converting string to double in C#

5 answers

I want to ask a user to input a number in a string type (because that's the only way in C#) and then convert it into a double type.

private static string InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Convert.ToDouble(Console.ReadLine());

}

I hope anyone has a solution for this.

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

asked Jan 3 at 10:07

Rammah

102

marked as duplicate by Uwe Keim, Kirk Larkin, HimBromBeere, mason c#
Users with the c# badge can single-handedly close c# questions as duplicates and reopen them as needed.

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Jan 3 at 15:02

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

5

Your method should return double

– Backs
Jan 3 at 10:08

1

What is problem? (other than: your method should return double).

– isaeid
Jan 3 at 10:12

1

Ohh lol, didn't see that -_- thanks!

– Rammah
Jan 3 at 10:12

Remember to catch exceptions like FormatException for example.

– Valentin P
Jan 3 at 10:14

@ValentinP Which is a really bad appraoch to prevent whrongly formatted input from being parsed. Better would be using TryParse. Don´t catch exceptions when you can avoid them in the first place.

– HimBromBeere
Jan 3 at 10:15

|
show 1 more comment

-2

This question already has an answer here:

Converting string to double in C#

5 answers

I want to ask a user to input a number in a string type (because that's the only way in C#) and then convert it into a double type.

private static string InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Convert.ToDouble(Console.ReadLine());

}

I hope anyone has a solution for this.

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

asked Jan 3 at 10:07

Rammah

102

This question already has an answer here:

Converting string to double in C#

5 answers

I want to ask a user to input a number in a string type (because that's the only way in C#) and then convert it into a double type.

private static string InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Convert.ToDouble(Console.ReadLine());

}

I hope anyone has a solution for this.

This question already has an answer here:

Converting string to double in C#

5 answers

c# type-conversion

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

asked Jan 3 at 10:07

Rammah

102

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

asked Jan 3 at 10:07

Rammah

102

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

edited Jan 3 at 10:09

Uwe Keim

27.7k32135216

asked Jan 3 at 10:07

Rammah

102

asked Jan 3 at 10:07

Rammah

102

asked Jan 3 at 10:07

Rammah

102

marked as duplicate by Uwe Keim, Kirk Larkin, HimBromBeere, mason c#
Users with the c# badge can single-handedly close c# questions as duplicates and reopen them as needed.

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Jan 3 at 15:02

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

marked as duplicate by Uwe Keim, Kirk Larkin, HimBromBeere, mason c#
Users with the c# badge can single-handedly close c# questions as duplicates and reopen them as needed.

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Jan 3 at 15:02

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

5

Your method should return double

– Backs
Jan 3 at 10:08

1

What is problem? (other than: your method should return double).

– isaeid
Jan 3 at 10:12

1

Ohh lol, didn't see that -_- thanks!

– Rammah
Jan 3 at 10:12

Remember to catch exceptions like FormatException for example.

– Valentin P
Jan 3 at 10:14

@ValentinP Which is a really bad appraoch to prevent whrongly formatted input from being parsed. Better would be using TryParse. Don´t catch exceptions when you can avoid them in the first place.

– HimBromBeere
Jan 3 at 10:15

|
show 1 more comment

5

Your method should return double

– Backs
Jan 3 at 10:08

1

What is problem? (other than: your method should return double).

– isaeid
Jan 3 at 10:12

1

Ohh lol, didn't see that -_- thanks!

– Rammah
Jan 3 at 10:12

Remember to catch exceptions like FormatException for example.

– Valentin P
Jan 3 at 10:14

@ValentinP Which is a really bad appraoch to prevent whrongly formatted input from being parsed. Better would be using TryParse. Don´t catch exceptions when you can avoid them in the first place.

– HimBromBeere
Jan 3 at 10:15

Your method should return double

– Backs
Jan 3 at 10:08

What is problem? (other than: your method should return double).

– isaeid
Jan 3 at 10:12

Ohh lol, didn't see that -_- thanks!

– Rammah
Jan 3 at 10:12

Remember to catch exceptions like FormatException for example.

– Valentin P
Jan 3 at 10:14

@ValentinP Which is a really bad appraoch to prevent whrongly formatted input from being parsed. Better would be using TryParse. Don´t catch exceptions when you can avoid them in the first place.

– HimBromBeere
Jan 3 at 10:15

|
show 1 more comment

3 Answers
3

active

oldest

votes

You can use Double's TryParse method:

public Double? StringToDouble(String input){

    if(Double.TryParse(input, out Double d)) {

        Console.WriteLine("The double value is {0}", d);

        return d;

    }

    else{

       Console.WriteLine("The input string was not in correct format");

   }

   return null;

}

The advantage of the TryParse method over the Parse method is that in case the input is not in correct format, it does not throw any exception and rather it returns a boolean indicating whether the value has been successfully parsed or not.

edited Jan 3 at 10:15

answered Jan 3 at 10:09

Transcendent

3,25431641

The OPs problem is not that the string cannot be parsed. Thus your solution won´t help him/her at all.

– HimBromBeere
Jan 3 at 10:12

@HimBromBeere: Although I don't really agree with you, I improved my answer.

– Transcendent
Jan 3 at 10:15

add a comment |

Use Double.Parse:

private static double InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Double.Parse(Console.ReadLine());

}

answered Jan 3 at 10:09

Nick

2,3671215

add a comment |

Use Double.Parse.

This is the code:

Console.WriteLine("Enter a number : ");

string numString = Console.ReadLine(); //string

double numDouble = double.Parse(numString); //double

If you want to convert the double to string then use. Let's assume doubleText as the double.

string stringText = doubleText.ToString();

edited Jan 3 at 15:02

mason

23.9k74783

answered Jan 3 at 12:02

Roshan Kumar

268

add a comment |

3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

You can use Double's TryParse method:

public Double? StringToDouble(String input){

    if(Double.TryParse(input, out Double d)) {

        Console.WriteLine("The double value is {0}", d);

        return d;

    }

    else{

       Console.WriteLine("The input string was not in correct format");

   }

   return null;

}

edited Jan 3 at 10:15

answered Jan 3 at 10:09

Transcendent

3,25431641

The OPs problem is not that the string cannot be parsed. Thus your solution won´t help him/her at all.

– HimBromBeere
Jan 3 at 10:12

@HimBromBeere: Although I don't really agree with you, I improved my answer.

– Transcendent
Jan 3 at 10:15

add a comment |

You can use Double's TryParse method:

public Double? StringToDouble(String input){

    if(Double.TryParse(input, out Double d)) {

        Console.WriteLine("The double value is {0}", d);

        return d;

    }

    else{

       Console.WriteLine("The input string was not in correct format");

   }

   return null;

}

edited Jan 3 at 10:15

answered Jan 3 at 10:09

Transcendent

3,25431641

The OPs problem is not that the string cannot be parsed. Thus your solution won´t help him/her at all.

– HimBromBeere
Jan 3 at 10:12

@HimBromBeere: Although I don't really agree with you, I improved my answer.

– Transcendent
Jan 3 at 10:15

add a comment |

You can use Double's TryParse method:

public Double? StringToDouble(String input){

    if(Double.TryParse(input, out Double d)) {

        Console.WriteLine("The double value is {0}", d);

        return d;

    }

    else{

       Console.WriteLine("The input string was not in correct format");

   }

   return null;

}

edited Jan 3 at 10:15

answered Jan 3 at 10:09

Transcendent

3,25431641

You can use Double's TryParse method:

public Double? StringToDouble(String input){

    if(Double.TryParse(input, out Double d)) {

        Console.WriteLine("The double value is {0}", d);

        return d;

    }

    else{

       Console.WriteLine("The input string was not in correct format");

   }

   return null;

}

edited Jan 3 at 10:15

answered Jan 3 at 10:09

Transcendent

3,25431641

edited Jan 3 at 10:15

answered Jan 3 at 10:09

Transcendent

3,25431641

answered Jan 3 at 10:09

Transcendent

3,25431641

answered Jan 3 at 10:09

Transcendent

3,25431641

The OPs problem is not that the string cannot be parsed. Thus your solution won´t help him/her at all.

– HimBromBeere
Jan 3 at 10:12

@HimBromBeere: Although I don't really agree with you, I improved my answer.

– Transcendent
Jan 3 at 10:15

add a comment |

The OPs problem is not that the string cannot be parsed. Thus your solution won´t help him/her at all.

– HimBromBeere
Jan 3 at 10:12

@HimBromBeere: Although I don't really agree with you, I improved my answer.

– Transcendent
Jan 3 at 10:15

The OPs problem is not that the string cannot be parsed. Thus your solution won´t help him/her at all.

– HimBromBeere
Jan 3 at 10:12

@HimBromBeere: Although I don't really agree with you, I improved my answer.

– Transcendent
Jan 3 at 10:15

add a comment |

Use Double.Parse:

private static double InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Double.Parse(Console.ReadLine());

}

answered Jan 3 at 10:09

Nick

2,3671215

add a comment |

Use Double.Parse:

private static double InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Double.Parse(Console.ReadLine());

}

answered Jan 3 at 10:09

Nick

2,3671215

add a comment |

Use Double.Parse:

private static double InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Double.Parse(Console.ReadLine());

}

answered Jan 3 at 10:09

Nick

2,3671215

Use Double.Parse:

private static double InputDouble(double prompt)

{

    Console.WriteLine("{0:s}: ", prompt);

    return Double.Parse(Console.ReadLine());

}

answered Jan 3 at 10:09

Nick

2,3671215

answered Jan 3 at 10:09

Nick

2,3671215

answered Jan 3 at 10:09

Nick

2,3671215

answered Jan 3 at 10:09

Nick

2,3671215

add a comment |

Use Double.Parse.

This is the code:

Console.WriteLine("Enter a number : ");

string numString = Console.ReadLine(); //string

double numDouble = double.Parse(numString); //double

If you want to convert the double to string then use. Let's assume doubleText as the double.

string stringText = doubleText.ToString();

edited Jan 3 at 15:02

mason

23.9k74783

answered Jan 3 at 12:02

Roshan Kumar

268

add a comment |

Use Double.Parse.

This is the code:

Console.WriteLine("Enter a number : ");

string numString = Console.ReadLine(); //string

double numDouble = double.Parse(numString); //double

If you want to convert the double to string then use. Let's assume doubleText as the double.

string stringText = doubleText.ToString();

edited Jan 3 at 15:02

mason

23.9k74783

answered Jan 3 at 12:02

Roshan Kumar

268

add a comment |

Use Double.Parse.

This is the code:

Console.WriteLine("Enter a number : ");

string numString = Console.ReadLine(); //string

double numDouble = double.Parse(numString); //double

If you want to convert the double to string then use. Let's assume doubleText as the double.

string stringText = doubleText.ToString();

edited Jan 3 at 15:02

mason

23.9k74783

answered Jan 3 at 12:02

Roshan Kumar

268

Use Double.Parse.

This is the code:

Console.WriteLine("Enter a number : ");

string numString = Console.ReadLine(); //string

double numDouble = double.Parse(numString); //double

If you want to convert the double to string then use. Let's assume doubleText as the double.

string stringText = doubleText.ToString();

edited Jan 3 at 15:02

mason

23.9k74783

answered Jan 3 at 12:02

Roshan Kumar

268

edited Jan 3 at 15:02

mason

23.9k74783

edited Jan 3 at 15:02

mason

23.9k74783

edited Jan 3 at 15:02

mason

23.9k74783

answered Jan 3 at 12:02

Roshan Kumar

268

answered Jan 3 at 12:02

Roshan Kumar

268

answered Jan 3 at 12:02

Roshan Kumar

268

add a comment |

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