Kotlin Program to Add Two Complex numbers

In this article, we will understand how to add two complex numbers in Kotlin. They have the ?I? that is, an imaginary part associated with it.

Below is a demonstration of the same ?

Suppose our input is

15 +i24 and 3 +i7

The desired output would be

18 +i31

Algorithm

• Step 1 ? Start

• Step 2 ? Declare three Complex numbers: inputValue1, inputValue2 and myResult

• Step 3 ? Hardcode the complex number values

• Step 4 ? Define a function addComplexNumber, wherein you add the real numbers and the imaginary numbers separately and return the result.

• Step 5 ? Store the result in myResult variable.

• Step 6 ? Display the result

• Step 7 ? Stop

Example 1

In this example, we will add two complex numbers in Kotlin

<div class="execute"></div><div class="code-mirror  language-kotlin" contenteditable="plaintext-only" spellcheck="false" style="outline: none; overflow-wrap: break-word; overflow-y: auto; white-space: pre-wrap;"><span class="token keyword">class</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token keyword">internal</span> <span class="token keyword">var</span> real<span class="token operator">:</span> Double<span class="token punctuation">,</span> <span class="token keyword">internal</span> <span class="token keyword">var</span> imaginary<span class="token operator">:</span> Double<span class="token punctuation">)</span>

<span class="token keyword">fun</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token keyword">val</span> inputValue1 <span class="token operator">=</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token number">15.0</span><span class="token punctuation">,</span> <span class="token number">24.0</span><span class="token punctuation">)</span>
   <span class="token keyword">val</span> inputValue2 <span class="token operator">=</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token number">3.0</span><span class="token punctuation">,</span> <span class="token number">7.0</span><span class="token punctuation">)</span>

   System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">"The input values are (%.1f, i%.1f) and (%.1f, i%.1f) <br>"</span> <span class="token punctuation">,</span>inputValue1<span class="token punctuation">.</span>real<span class="token punctuation">,</span> inputValue1<span class="token punctuation">.</span>imaginary <span class="token punctuation">,</span> inputValue2<span class="token punctuation">.</span>real<span class="token punctuation">,</span> inputValue2<span class="token punctuation">.</span>imaginary<span class="token punctuation">)</span>

   <span class="token keyword">val</span> myResult <span class="token operator">=</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token number">0.0</span><span class="token punctuation">,</span> <span class="token number">0.0</span><span class="token punctuation">)</span>

   myResult<span class="token punctuation">.</span>real <span class="token operator">=</span> inputValue1<span class="token punctuation">.</span>real <span class="token operator">+</span> inputValue2<span class="token punctuation">.</span>real
   myResult<span class="token punctuation">.</span>imaginary <span class="token operator">=</span> inputValue1<span class="token punctuation">.</span>imaginary <span class="token operator">+</span> inputValue2<span class="token punctuation">.</span>imaginary

   System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">"The sum of the complex number is %.1f + i%.1f"</span><span class="token punctuation">,</span> myResult<span class="token punctuation">.</span>real<span class="token punctuation">,</span> myResult<span class="token punctuation">.</span>imaginary<span class="token punctuation">)</span>
<span class="token punctuation">}</span>
</div><div class="output-wrapper"><div class="console-close"></div><div class="code-output"></div></div>

Output

The input values are (15.0, i24.0) and (3.0, i7.0) 
The sum of the complex number is 18.0 + i31.0

Example 2

In this example, we will add two complex numbers in Kotlin using a custom function

<div class="execute"></div><div class="code-mirror  language-kotlin" contenteditable="plaintext-only" spellcheck="false" style="outline: none; overflow-wrap: break-word; overflow-y: auto; white-space: pre-wrap;"><span class="token keyword">class</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token keyword">internal</span> <span class="token keyword">var</span> real<span class="token operator">:</span> Double<span class="token punctuation">,</span> <span class="token keyword">internal</span> <span class="token keyword">var</span> imaginary<span class="token operator">:</span> Double<span class="token punctuation">)</span>

<span class="token keyword">fun</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
   <span class="token keyword">val</span> input1 <span class="token operator">=</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token number">15.0</span><span class="token punctuation">,</span> <span class="token number">24.0</span><span class="token punctuation">)</span>
   <span class="token keyword">val</span> input2 <span class="token operator">=</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token number">3.0</span><span class="token punctuation">,</span> <span class="token number">7.0</span><span class="token punctuation">)</span>
   <span class="token keyword">val</span> myResult<span class="token operator">:</span> Complex

   System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">"The input values are (%.1f, i%.1f) and (%.1f, i%.1f) <br>"</span> <span class="token punctuation">,</span>input1<span class="token punctuation">.</span>real<span class="token punctuation">,</span> input1<span class="token punctuation">.</span>imaginary <span class="token punctuation">,</span> input2<span class="token punctuation">.</span>real<span class="token punctuation">,</span> input2<span class="token punctuation">.</span>imaginary<span class="token punctuation">)</span>

   myResult <span class="token operator">=</span> <span class="token function">addComplexNumbers</span><span class="token punctuation">(</span>input1<span class="token punctuation">,</span> input2<span class="token punctuation">)</span>

   System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">"The sum of the complex number is %.1f + i%.1f"</span><span class="token punctuation">,</span> myResult<span class="token punctuation">.</span>real<span class="token punctuation">,</span> myResult<span class="token punctuation">.</span>imaginary<span class="token punctuation">)</span>
<span class="token punctuation">}</span>

<span class="token keyword">fun</span> <span class="token function">addComplexNumbers</span><span class="token punctuation">(</span>input1<span class="token operator">:</span> Complex<span class="token punctuation">,</span> input2<span class="token operator">:</span> Complex<span class="token punctuation">)</span><span class="token operator">:</span> Complex <span class="token punctuation">{</span>
   <span class="token keyword">val</span> myResult <span class="token operator">=</span> <span class="token function">Complex</span><span class="token punctuation">(</span><span class="token number">0.0</span><span class="token punctuation">,</span> <span class="token number">0.0</span><span class="token punctuation">)</span>
   
   myResult<span class="token punctuation">.</span>real <span class="token operator">=</span> input1<span class="token punctuation">.</span>real <span class="token operator">+</span> input2<span class="token punctuation">.</span>real
   myResult<span class="token punctuation">.</span>imaginary <span class="token operator">=</span> input1<span class="token punctuation">.</span>imaginary <span class="token operator">+</span> input2<span class="token punctuation">.</span>imaginary
   
   <span class="token keyword">return</span> myResult
<span class="token punctuation">}</span>
</div><div class="output-wrapper"><div class="console-close"></div><div class="code-output"></div></div>

Output

The input values are (15.0, i24.0) and (3.0, i7.0)
The sum of the complex number is 18.0 + i31.0