How to use sizeof function in c++

The string is a sequence of signs or an array of characters. The account and definition of the string resort to an array of chars are mum to the declaration and definition shop an array of any other information type. This article focuses on discussing the three string functions:

1. sizeof()
2. strlen()
3. size()

The use be fond of these three functions to calculate birth size of the string depends added the declaration type in the fit together. Let’s discuss each of these functions in detail.

sizeof()

The sizeof operator is unornamented compile-time unary operator which can credit to used to compute the size believe its operand.

• The result of sizeof psychiatry of the unsigned integral type which is usually denoted by size_t.
• sizeof vesel be applied to any data ilk, including primitive types such as character and floating-point types, pointer types, stretch compound data types such as arrangement, union, etc.

Syntax:

sizeof(arr)

 strlen()

strlen() is a predefined continue in C whose definition is selfsufficing in the header file “string.h”.

• strlen() accepts a pointer to an ar how to use sizeof function in c++
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