Glossary
An Implementation of J
| A | 1157 | The data type of an array; the data type of BOX array elements |
| a | 1883 | The left argument of a verb |
| a0j1 | 9 | The complex atom 0j1 |
| ainf | 14 | The floating point atom _ |
| AN(x) | 759 | The n part of an array (the number of atoms in the value part) |
| apv(n,b,m) | 96 | The arithmetic progression vector b+m*i.n |
| AN(x) | 759 | The n part of an array; the number of atoms in the value part |
| AR(x) | 581 | The r part of an array; the rank of an array |
| AS(x) | 477 | The s part of an array; the shape of an array |
| ASSERT(p,e) | 822 | Signal error e if proposition p is not true |
| AT(x) | 733 | The t part of an array; the type of an array |
| B | 706 | The data type of B01 array elements |
| B01 | 160 | The type of a Boolean array |
| bp(t) | 92 | The number of bytes per atom of type t |
| C | 566 | The data type of LIT array elements |
| cstr(s) | 93 | A string with value the characters in the 0-terminated string s |
| DO(n,stmt) | 905 | Execute n times the statement stmt, with local variable i running from 0 to n-1 |
| EPILOG(x) | 82 | Free all temporary storage used since the last PROLOG, then return x as a result |
| F1(f) | 705 | Define f as a monadic verb or an adverb |
| F2(f) | 326 | Define f as a dyadic verb or a conjunction |
| GA(t,n,r,s) | 583 | Create an array of type t of rank r and shape s, with n atoms |
| I | 1537 | The data type in C of a full-word integer |
| iv0 | 17 | ,2-2, the integer vector 0 |
| iv1 | 18 | ,2-1, the integer vector 1 |
| jt | 2557 | Points to a structure of all the global variables for a J instance |
| LIT | 566 | The type of a literal (character) array (CHAR conflicts with C usage) |
| mtm | 44 | The empty matrix i.0 0 |
| mtv | 73 | The empty vector i.0 |
| neg1 | 22 | The integer atom _1 |
| one | 98 | The Boolean atom 1 |
| pie | 5 | The floating point atom p (pi conflicts with C usage) |
| PROLOG | 85 | Establish a checkpoint for temporary storage usage |
| RE(x) | 220 | Return 0 if an error is signalled in executing x |
| RZ(x) | 1537 | Return 0 if x is 0 |
| sc(k) | 217 | An integer atom with value k (equivalent to sc4(INT,k)) |
| sc4(t,k) | 5 | An atom of type t with 4-byte value k |
| scc(c) | 17 | A literal atom with value c |
| scf(x) | 26 | A floating point atom with value x |
| str(n,s) | 52 | A string (literal list) of length n with value the characters pointed to by s |
| two | 24 | The integer atom 2 |
| v1(k) | 15 | The integer vector ,k |
| v2(a,b) | 72 | The integer vector a,b |
| vec(t,n,v) | 81 | A vector of length n of type t, with values pointed to by v |
| vi(x) | 45 | "Verify integer", convert x to integer |
| w | 3207 | The right argument of a verb | zero | 129 | The Boolean atom 0 |