Write a program that prints the sum of digits of a number.

C Programming Language Loop control in C Language (Article) Loop control in C Language (Program)

1039

---

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"> n</span><span class="pun">,</span><span class="pln"> s</span><span class="pun">=</span><span class="lit">0</span><span class="pun">,</span><span class="pln"> r</span><span class="pun">;</span><span class="pln">
	printf</span><span class="pun">(</span><span class="str">"\n Enter the Number: "</span><span class="pun">);</span><span class="pln">
	scanf</span><span class="pun">(</span><span class="str">"%d"</span><span class="pun">,</span><span class="pln"> </span><span class="pun">&amp;</span><span class="pln">n</span><span class="pun">);</span><span class="pln">
	</span><span class="kwd">while</span><span class="pun">(</span><span class="pln">n</span><span class="pun">&gt;</span><span class="lit">0</span><span class="pun">)</span><span class="pln">
	</span><span class="pun">{</span><span class="pln">
		r</span><span class="pun">=</span><span class="pln">n</span><span class="pun">%</span><span class="lit">10</span><span class="pun">;</span><span class="pln">
		s</span><span class="pun">=</span><span class="pln">s</span><span class="pun">+</span><span class="pln">r</span><span class="pun">;</span><span class="pln">
		n</span><span class="pun">=</span><span class="pln">n</span><span class="pun">/</span><span class="lit">10</span><span class="pun">;</span><span class="pln">
	</span><span class="pun">}</span><span class="pln">
	printf</span><span class="pun">(</span><span class="str">"\nSum of digits %d"</span><span class="pun">,</span><span class="pln"> s</span><span class="pun">);</span><span class="pln">
	
	getch</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:

Output 1:

 Enter the Number: 123

Sum of digits 6

Output 2

 Enter the Number: 1111

Sum of digits 4

Explanation:

---

---