std::sqrt - cppreference.com
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      std::sqrt

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      C++
       
      Biblioteca numéricos
      Funções matemáticas comuns
      De ponto flutuante ambiente
      Números complexos
      Matrizes numéricas
      Pseudo-aleatório de geração de números
      Tempo de compilação aritmética racional (C++11)
      Genéricos operações numéricas
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      Generic numeric operations
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      Funções matemáticas comuns
      Funções
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      Functions
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      Operações básicas
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      Basic operations
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      Funções exponenciais
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      Exponential functions
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      Funções de poder
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      Power functions
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      Funções trigonométricas e hiperbólicas
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      Trigonometric and hyperbolic functions
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      Erro e funções gamma
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      Error and gamma functions
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      Número inteiro mais próximo de operações de ponto flutuante
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      Nearest integer floating point operations
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      Flutuando funções de manipulação de pontos
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      Floating point manipulation functions
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      Constantes de macros
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      Macro constants
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      <tbody> </tbody>
      Definido no cabeçalho <cmath>
      float sqrt( float arg );
      double sqrt( double arg );
      long double sqrt( long double arg );
      double sqrt( Integral arg );
      		 (desde C++11)
      Calcula a raiz quadrada de arg.
      Original:
      Computes square root of arg.
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      Parâmetros

      arg -
      ponto flutuante ou valor inteiro
      Original:
      floating point or integer value
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      Valor de retorno

      raiz quadrada de arg.
      Original:
      square root of arg.
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      Erro de domínio ocorre se arg é negativo. NAN é devolvido em caso.
      Original:
      Domain error occurs if arg is negative. NAN is returned in that case.
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