sizeof is an unary operator
strlen is a function
sizeof will return the size of datatype or the space reserved for variable in bytes
strlen will return the length of the C string excluding null byte '\0'
Here is the test program:
#include
#include
int main(int argc, char *argv[])
{
char a = "A";
char *name = "Hakuma Natata";
char bucket[20] = "1234567890";
//sizeof
printf("The sizeof char is: %u\n", sizeof(char)); //<- a="" br="" char="" nbsp=""> printf("The sizeof a is: %u\n", sizeof(a)); //<- a="" br="" char=""> printf("The sizeof *name is: %u\n", sizeof(*name)); //<- a="" br="" char="" of="" point="" pointer="" the="" value=""> printf("The sizeof name is: %u\n", sizeof(name)); //<- a="" br="" pointer="" space=""> printf("The sizeof bucket is: %u\n", sizeof(bucket)); //<- array="" assign="" br="" char="" for="" nbsp="" space="" the=""> printf("The sizeof *bucket is: %u\n", sizeof(*bucket)); //<- a="" br="" char="">
//strlen
int length = strlen(name);
printf("The strlen name is: %d\n", length);
length = strlen(bucket);
printf("The strlen bucket is: %d\n", length);
return 0;
}
