Typical ways to enter characters. All printable ASCII characters can be entered directly. Those that are not alphanumeric are assigned explicit names in Mathematica, allowing ...

Functions relating real numbers and integers. Extracting integer and fractional parts. IntegerPart[x] and FractionalPart[x] can be thought of as extracting digits to the left ...

Rational is the head used for rational numbers.

Using the latest platform-optimized code, Mathematica not only delivers high-efficiency machine-precision evaluation of elementary functions, but also—using a number of ...

DigitQ[string] yields True if all the characters in the string are digits in the range 0 through 9, and yields False otherwise.

Mathematica makes it easy to "bulletproof" packages, and prevent features of their environment from affecting their internal operation.

RealExponent[x] gives log_10 (|x|).RealExponent[x, b] gives log_b (|x|).

LatticeData[lattice, " property"] gives the specified property for a lattice.LatticeData[n] gives a list of named lattices of dimension n.

PaddedForm[expr, n] prints with all numbers in expr padded to leave room for a total of n digits. PaddedForm[expr, {n, f}] prints with approximate real numbers having exactly ...

Mathematica has a wide coverage of named functions defined by sums and recurrence relations. Often using original algorithms developed at Wolfram Research, Mathematica ...