I am looking to write some scientific programs in which I have a good degree of confidence is accurate and are easily understandable, maintainable, and extendib

I am looking to write some scientific programs in which I have a good degree of confidence is accurate and are easily understandable, maintainable, and extendible. Speed, in terms of both writing the programs and running them, is also a factor. Theoretically, I can write these programs in just about any language. However, I get the impression Haskell can do all this in a well-balanced way. At the least, I hear claims of such.