CODEWITHSUNDEEP
schemeracket
user618815
user618815

Reputation:

Turn string into number in Racket

I used read to get a line from a file. The documentation said read returns any, so is it turning the line to a string? I have problems turning the string "1" to the number 1, or "500.8232" into 500.8232. I am also wondering if Racket can directly read numbers in from a file.

Upvotes: 3

Views: 5909

Answers (2)

Inaimathi
Inaimathi

Reputation: 14065

Check out their documentation search, it's complete and accurate. Conversion functions usually have the form of foo->bar (which you can assume takes a foo and returns a bar constructed from it).

You sound like you're looking for a function that takes a string and returns a number, and as it happens, string->number does exist, and does pretty much exactly what you're looking for.

Upvotes: 9

Kyle Burton
Kyle Burton

Reputation: 27528

Looks like this was answered in another question:

Convert String to Code in Scheme

NB: that converts any s-expression, not just integers. If you want just integers, try:

string->number

Which is mentioned in

Scheme language: merge two numbers

HTH

Upvotes: 1

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