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- ISINF(3) UNIX Programmer's Manual ISINF(3)
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- NNAAMMEE
- iissiinnff, iissnnaann - test for infinity or notanumber (_N_a_N)
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- SSYYNNOOPPSSIISS
- _i_n_t
- iissiinnff(_d_o_u_b_l_e)
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- _i_n_t
- iissnnaann(_d_o_u_b_l_e)
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- DDEESSCCRRIIPPTTIIOONN
- The iissnniinnff() function returns 1 if the number is ``infinity'', otherwise
- 0.
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- The iissnnaann() function returns 1 if the number is ``_N_a_N'', otherwise 0.
-
- SSEEEE AALLSSOO
- math(3)
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- _I_E_E_E _S_t_a_n_d_a_r_d _f_o_r _B_i_n_a_r_y _F_l_o_a_t_i_n_g__P_o_i_n_t _A_r_i_t_h_m_e_t_i_c, Std 7541985, ANSI.
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- BBUUGGSS
- Neither the VAX nor the Tahoe floating point have distinguished values
- for either infinity or notanumber. These routines always return 0 on
- those architectures.
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- BSD Experimental April 20, 1991 1
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