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Decode the Coding Interview in C++: Real-World Examples

DIY: Valid Number

Understand how to validate if a string can be interpreted as a decimal number. Learn to handle characters like digits, signs, decimals, and exponents to solve this common coding interview problem effectively.

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Problem statement

Validate if a given string can be interpreted as a decimal number or not. Here is a list of characters that can appear in a valid decimal number:

  • Numbers - 0-9

  • Exponent - "e"

  • Positive/negative sign - "+"/"-" ...