Question 233894 in Flutter Question posted in
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Flutter – This is a currency converter app . Why cant i divide it?

im trying to divide a number by 23 in flutter

I expected to directly get a number back but instead i got this error

The operator ‘/’ isn’t defined for the type ‘String’.
Try defining the operator ‘/’.

My code is:

  print(textEditingController.text/23);
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2

Answers


  1. 0

    The type of textEditingController.text is String and a String doesn’t have a divide operation.

    The solution is to convert the textEditingController.text String to a number before doing the divide operation like this:

     final textAsNumber = num.tryParse(textEditingController.text) ?? 0;
  
 print(textAsNumber/23);

    The first line of code above means we try parsing the text (and setting textAsNumber to a num type and if it the text can’t be parsed to a num (thereby returning null), we set textAsNumber to0.

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  2. 0

    It’s because you’re parsing it as a text, not a number variable, try to change it to

    print(double.parse(textEditingController.text)/23);
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