std::numeri...n_exponent10(3)

💖 NAME 💖

okay bestie, welcome to the certified slay page for std::numeric_limits::min_exponent10 — and the official NAME line is literally std::numeric_limits::min_exponent10 - std::numeric_limits::min_exponent10 (yes, twice, it’s giving main character energy 👑). you’re in the C++ Standard Libary manual, section std::numeri...n_exponent10(3), so fold that tiny crown into your brain and let’s go 💅.

✨ Synopsis ✨

static const int min_exponent10;      (until C++11)
static constexpr int min_exponent10;  (since C++11)

the value of std::numeric_limits<T>::min_exponent10 is the lowest negative number n such that 10^n is a valid normalized value of the floating-point type T. no cap, that’s the whole vibe check 🫶.

🌈 Standard specializations 🌈

here’s the value of std::numeric_limits<T>::min_exponent10 for every T on the list, bestie:

• /* non-specialized */ — 0
• bool — 0
• char — 0
• signed char — 0
• unsigned char — 0
• wchar_t — 0
• char8_t (since C++20) — 0
• char16_t (since C++11) — 0
• char32_t (since C++11) — 0
• short — 0
• unsigned short — 0
• int — 0
• unsigned int — 0
• long — 0
• unsigned long — 0
• long long (since C++11) — 0
• unsigned long long (since C++11) — 0
• float — FLT_MIN_10_EXP
• double — DBL_MIN_10_EXP
• long double — LDBL_MIN_10_EXP

🧪 Example 🧪

Demonstrates the relationships of min_exponent, min_exponent10, min(), and radix for the type float:

// Run this code

#include <iostream>
#include <limits>

int main()
{
    std::cout << "min() = " << std::numeric_limits<float>::min() << '\n'
              << "min_exponent10 = " << std::numeric_limits<float>::min_exponent10 << '\n'
              << std::hexfloat << '\n'
              << "min() = " << std::numeric_limits<float>::min() << '\n'
              << "min_exponent = " << std::numeric_limits<float>::min_exponent << '\n';
}

📤 Output 📤

min() = 1.17549e-38
min_exponent10 = -37

min() = 0x1p-126
min_exponent = -125

👀 See also 👀

• min_exponent [static] — one more than the smallest negative power of the radix that is a valid normalized floating-point value (public static member constant)
• max_exponent [static] — one more than the largest integer power of the radix that is a valid finite floating-point value (public static member constant)
• max_exponent10 [static] — the largest integer power of 10 that is a valid finite floating-point value (public static member constant)

source/version/date sign-off: http://cppreference.com · 2024.06.10 · std::numeri...n_exponent10(3) — mwah, bye bestie 💖🫶