How to set all elements of an array to zero or any same value

Question

I m beginner in C and I really need an efficient method to set all elements of an array equal zero or any same value  My array is too long  so I don t want to do it with for loop

User · Answer

If your array is static or global it s initialized to zero before main   starts  That would be the most efficient option

User · Answer

If your array has static storage allocation  it is default initialized to zero  However  if the array has automatic storage allocation  then you can simply initialize all its elements to zero using an array initializer list which contains a zero      function scope    this initializes all elements to 0 int arr 4     0      equivalent to int arr 4     0  0  0  0       file scope int arr 4      equivalent to int arr 4     0     Please note that there is no standard way to initialize the elements of an array to a value other than zero using an initializer list which contains a single element  the value   You must explicitly initialize all elements of the array using the initializer list      initialize all elements to 4 int arr 4     4  4  4  4      equivalent to int arr      4  4  4  4

User · Answer

You could use memset  if you sure about the length   memset ptr  0x00  length

User · Answer

int myArray 10      5  5  5  5  5  5  5  5  5  5       All elements of myArray are 5 int myArray 10      0          Will initialize all elements to 0 int myArray 10      5          Will initialize myArray 0  to 5 and other elements to 0 static int myArray 10      Will initialize all elements to 0                                                                                        int myArray 10     This will declare and define  allocate memory  but won   t initialize int i      Loop variable for  i   0  i  lt  10    i     Using for loop we are initializing       myArray i    5                                                                                           int myArray 10      0     9    5      This works only in GCC

[c] How to set all elements of an array to zero or any same value?

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