is0 Function (ROM Call 0x269)

AMS 2.00 or higher estack.h

short is0 (CESI ptr);

Tests if an expression is equal to 0.

Returns TRUE if the expression pointed to by ptr is equal to zero (integer or floating point).


Uses: estack_to_float, primary_tag_list, _bcd_math
Used by: estack_to_short, estack_to_ushort, is_antisymmetric, is_complex0, is_never0, is_nonnegative, is_nonpositive, is_symmetric, cmd_dialog, cmd_endfor, cmd_for, cmd_passerr, did_push_anti_deriv, did_push_series, push_1st_derivative, push_asin, push_asinh, push_atan, push_atanh, push_comb, push_comdenom, push_cosh, push_csolve, push_czeros, push_def_int, push_denominator, push_desolve, push_determinant, push_exp, push_expand, push_extended_prod, push_factor, push_floor, push_im, push_integer_lcm, push_integer_quotient, push_integer_remainder, push_is_prime, push_lim, push_ln, push_max, push_min, push_mod, push_nsolve, push_nth_derivative, push_numerator, push_phase, push_rand, push_randpoly, push_re, push_rec_to_angle, push_red_row_ech, push_row_echelon, push_sequence, push_simult, push_sin2, push_sinh, push_solve, push_summation, push_tan, push_tanh, push_zeros, did_push_to_polar, push_equals, push_exponentiate, push_factorial, push_greater_than, push_greater_than_or_equals, push_less_than, push_less_than_or_equals, push_negate, push_not_equals, push_product, push_sum, push_to_cylin, push_to_sphere, ST_eraseHelp, ST_modKey, add_to_top, are_units_consistent, did_push_approx_inflection_point, did_push_divide_units, get_ub, index_if_pushed_qquad_info, push_auto_units_conversion, push_but_factor, push_but_term, push_constant_factors, push_constant_terms, push_dependent_factors, push_dependent_terms, push_gcd_then_cofactors, push_independent_factors, push_independent_terms, push_lu_fact, push_make_proper, push_nonconstant_factors, push_nonconstant_terms, push_nonnumeric_factors, push_poly_qr, push_reciprocal, push_sq_matrix_to_whole_number, push_standardize, push_symbolic_qr_fact, raise_to_top, replace_top_with_post_simplified, replace_top2_with_imre, replace_top2_with_pow, replace_top2_with_prod, replace_top2_with_sum, times_top, ROM Call 0x4C7


See also: is1, is_minus1, is_never0