Problem Description: Write a function isValidDouble to validate the format for a real number which has been entered usin

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Problem Description: Write a function isValidDouble to validate the format for a real number which has been entered using the keyboard. Test your function using the following test cases: -23486.33 67425 $24576.79 54,765.98 76.543.20 Write a function readDouble that uses isValidDouble. Demonstrate your function.
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