Single and double precision floating-point numbers have different read syntax but print the same way.
Welcome to Racket v5.0.99.6. > 1.0e0 1.0 > (flonum? 1.0e0) #t > 1.0f0 1.0 > (flonum? 1.0f0) #f Is this a bug? Also, it seems there's no read syntax for single-precision specials (nan and infinities), even though they exist. > +nan.0 +nan.0 > (flonum? +nan.0) #t > (/ 0.0f0 0.0f0) +nan.0 > (flonum? (/ 0.0f0 0.0f0)) #f I could add +nan.0f0 (or any exponent) and others. For symmetry, I could also add +nan.0e0 and others as syntax for double-precision specials. It would also be nice to have conversion functions to convert between the two kinds of floating-point numbers. If nobody objects, I'll implement that. Vincent _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev