std::log10, std::log10f, std::log10l
From cppreference.com
| Defined in header <cmath>
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| (1) | ||
float log10 ( float num ); double log10 ( double num ); |
(until C++23) | |
| /*floating-point-type*/ log10 ( /*floating-point-type*/ num ); |
(since C++23) (constexpr since C++26) |
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float log10f( float num ); |
(2) | (since C++11) (constexpr since C++26) |
long double log10l( long double num ); |
(3) | (since C++11) (constexpr since C++26) |
| SIMD overload (since C++26) |
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| Defined in header <simd>
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| template< /*math-floating-point*/ V > constexpr /*deduced-simd-t*/<V> |
(S) | (since C++26) |
| Additional overloads (since C++11) |
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| Defined in header <cmath>
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template< class Integer > double log10 ( Integer num ); |
(A) | (constexpr since C++26) |
1-3) Computes the common (base-10) logarithm of num. The library provides overloads of
std::log10 for all cv-unqualified floating-point types as the type of the parameter.(since C++23)|
S) The SIMD overload performs an element-wise
std::log10 on v_num.
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(since C++26) |
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A) Additional overloads are provided for all integer types, which are treated as double.
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(since C++11) |
Contents |
[edit] Parameters
| num | - | floating-point or integer value |
[edit] Return value
If no errors occur, the common (base-10) logarithm of num (log10(num) or lg(num)) is returned.
If a domain error occurs, an implementation-defined value is returned (NaN where supported).
If a pole error occurs, -HUGE_VAL, -HUGE_VALF, or -HUGE_VALL is returned.
[edit] Error handling
Errors are reported as specified in math_errhandling.
Domain error occurs if num is less than zero.
Pole error may occur if num is zero.
If the implementation supports IEEE floating-point arithmetic (IEC 60559),
- If the argument is ±0, -∞ is returned and FE_DIVBYZERO is raised.
- If the argument is 1, +0 is returned.
- If the argument is negative, NaN is returned and