sizeof() operator, Returns the size of a variable.

C Programming Language Operators and Enums in C Language (Article) Operators and Enums in C Language (Program)

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Program:

<span class="com">#include</span><span class="pln"> </span><span class="str">&lt;stdio.h&gt;</span><span class="pln">
</span><span class="kwd">int</span><span class="pln"> main</span><span class="pun">()</span><span class="pln">
</span><span class="pun">{</span><span class="pln">
    </span><span class="kwd">int</span><span class="pln"> a</span><span class="pun">,</span><span class="pln"> e</span><span class="pun">[</span><span class="lit">10</span><span class="pun">];</span><span class="pln">
    </span><span class="kwd">float</span><span class="pln"> b</span><span class="pun">;</span><span class="pln">
    </span><span class="kwd">double</span><span class="pln"> c</span><span class="pun">;</span><span class="pln">
    </span><span class="kwd">char</span><span class="pln"> d</span><span class="pun">;</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"Size of int=%lu bytes\n"</span><span class="pun">,</span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">a</span><span class="pun">));</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"Size of float=%lu bytes\n"</span><span class="pun">,</span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">b</span><span class="pun">));</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"Size of double=%lu bytes\n"</span><span class="pun">,</span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">c</span><span class="pun">));</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"Size of char=%lu byte\n"</span><span class="pun">,</span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">d</span><span class="pun">));</span><span class="pln">
    printf</span><span class="pun">(</span><span class="str">"Size of integer type array having 10 elements = %lu bytes\n"</span><span class="pun">,</span><span class="pln"> </span><span class="kwd">sizeof</span><span class="pun">(</span><span class="pln">e</span><span class="pun">));</span><span class="pln">
    </span><span class="kwd">return</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln">
</span><span class="pun">}</span>

Output:

Size of int=4 bytes
Size of float=4 bytes
Size of double=8 bytes
Size of char=1 byte
Size of integer type array having 10 elements = 40 bytes
Press any key to continue . . .

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