C calloc() function

Calloc Function : Dynamic memory allocation 

ptr = (data_type *)calloc(No_of_elements ,sizeof(data_type));


Live Example


ptr = (int *) calloc(10,sizeof(int));


    

  • calloc :
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    • Header File : stdlib.h 
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    • Allocate 20 bytes of memory
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    • Sizeof Returns the Size of Parameter specified 
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    • 10 means allocate space at run time for 10 elements 
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    • (int *)  means Typecasting i.e Address of Block of memory is casted to address of Pointer
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    • On Success : 20 bytes will be allocated
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    • On Fail : Returns NULL
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    • Memory Address is assigned to Pointer ptr 
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    • Calloc is more efficient than malloc because it allocates memory in 1 clock cycle
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    • Calloc takes 2 arguments
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    • Allocates memory Block of n*sizeof(data_type )
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    • Clears allocated memory with Zero 
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