java中null是常量吗
Julia| C_NULL常数 (Julia | C_NULL Constant)
C_NULL is a constant of Ptr{Nothing} type in Julia programming language, it represents the null pointer value, which is used for C Null Pointer while calling external code.
C_NULL是Julia编程语言中Ptr {Nothing}类型的常量,它表示空指针值,该值在调用外部代码时用于C空指针。
Syntax:
句法:
C_NULL
Example:
例:
In this example, we are taking a variable x and assigning it with C_NULL. We are printing the value and type of x using using println() function and typeof() function.
在此示例中,我们采用变量x并将其分配给C_NULL 。 我们正在使用println()函数和typeof()函数来打印x的值和类型。
# Julia example of C_NULL
x = C_NULL
println("x: ", x)
println("typeof(x): ", typeof(x))
Output
输出量
x: Ptr{Nothing} @0x0000000000000000
typeof(x): Ptr{Nothing}
Reference: Julia constants
参考: Julia常数
翻译自: https://www.includehelp.com/julia/c_null-constant.aspx
java中null是常量吗