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ternary.html
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<title>Ballerina by Example: Ternary</title>
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<div class="highlight"><pre><span class="kd">function</span> <span class="nx">main</span> <span class="p">(</span><span class="kt">string</span><span class="p">[]</span> <span class="nx">args</span><span class="p">)</span> <span class="p">{</span>
<span class="kt">int</span> <span class="nx">x</span> <span class="p">=</span> <span class="mi">20</span><span class="p">;</span> <span class="kt">string</span> <span class="nx">ifElseOutput</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">x</span> <span class="o">>=</span> <span class="mi">50</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">ifElseOutput</span> <span class="p">=</span> <span class="s">"more than 50"</span><span class="p">;</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="nx">ifElseOutput</span> <span class="p">=</span> <span class="s">"less than 50"</span><span class="p">;</span>
<span class="p">}</span>
<span class="nb">println</span><span class="p">(</span><span class="s">"The output from If-Else: "</span> <span class="o">+</span> <span class="nx">ifElseOutput</span><span class="p">);</span>
<span class="kt">string</span> <span class="nx">ternaryOutput</span> <span class="p">=</span> <span class="nx">x</span> <span class="o">>=</span> <span class="mi">50</span> <span class="err">?</span> <span class="s">"more than 50"</span> <span class="p">:</span> <span class="s">"less than 50"</span><span class="p">;</span>
<span class="nb">println</span><span class="p">(</span><span class="s">"The output from Ternary expression: "</span> <span class="o">+</span> <span class="nx">ternaryOutput</span><span class="p">);</span>
<span class="kt">string</span> <span class="nx">nestedOutput</span> <span class="p">=</span> <span class="nx">x</span> <span class="o">>=</span> <span class="mi">50</span> <span class="err">?</span> <span class="s">"more than 50"</span> <span class="p">:</span>
<span class="nx">x</span> <span class="o">>=</span> <span class="mi">10</span> <span class="err">?</span> <span class="s">"more than 10"</span> <span class="p">:</span> <span class="s">"less than 10"</span><span class="p">;</span>
<span class="nb">println</span><span class="p">(</span><span class="s">"The output from nested ternary expression: "</span> <span class="o">+</span> <span class="nx">nestedOutput</span><span class="p">);</span>
<span class="p">}</span>
</pre></div>
</div>
<div class="example" id="ternary">
<div class="col-xs-11 col-sm-11 col-md-11">
<h2><a href="./">Ballerina by Example</a>: Ternary</h2>
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<td class="docs">
<p>The Ternary Operator is a conditional operator, that can be used as a shortcut for an if-else statement.
The ternary operator evaluates a condition and chooses one of two branches to execute.</p>
<p>The ternary operator takes three operands and uses “?” and “:” symbols to form it. Syntax
condition ? trueExpression : falseExpression</p>
</td>
<td class="code leading">
<div class="highlight"><pre><span class="kd">function</span> <span class="nx">main</span> <span class="p">(</span><span class="kt">string</span><span class="p">[]</span> <span class="nx">args</span><span class="p">)</span> <span class="p">{</span>
<span class="kt">int</span> <span class="nx">x</span> <span class="p">=</span> <span class="mi">20</span><span class="p">;</span>
</pre></div>
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</td>
<td class="code leading">
<div class="highlight"><pre> <span class="kt">string</span> <span class="nx">ifElseOutput</span><span class="p">;</span>
</pre></div>
</td>
</tr>
<tr>
<td class="docs">
<p>Writing a conditional statement using If-Else statement.</p>
</td>
<td class="code leading">
<div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nx">x</span> <span class="o">>=</span> <span class="mi">50</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">ifElseOutput</span> <span class="p">=</span> <span class="s">"more than 50"</span><span class="p">;</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="nx">ifElseOutput</span> <span class="p">=</span> <span class="s">"less than 50"</span><span class="p">;</span>
<span class="p">}</span>
<span class="nb">println</span><span class="p">(</span><span class="s">"The output from If-Else: "</span> <span class="o">+</span> <span class="nx">ifElseOutput</span><span class="p">);</span>
</pre></div>
</td>
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<tr>
<td class="docs">
<p>writing above condition using ternary expression.</p>
</td>
<td class="code leading">
<div class="highlight"><pre> <span class="kt">string</span> <span class="nx">ternaryOutput</span> <span class="p">=</span> <span class="nx">x</span> <span class="o">>=</span> <span class="mi">50</span> <span class="err">?</span> <span class="s">"more than 50"</span> <span class="p">:</span> <span class="s">"less than 50"</span><span class="p">;</span>
<span class="nb">println</span><span class="p">(</span><span class="s">"The output from Ternary expression: "</span> <span class="o">+</span> <span class="nx">ternaryOutput</span><span class="p">);</span>
</pre></div>
</td>
</tr>
<tr>
<td class="docs">
<p>Writing nested conditions using ternary expression.</p>
</td>
<td class="code">
<div class="highlight"><pre> <span class="kt">string</span> <span class="nx">nestedOutput</span> <span class="p">=</span> <span class="nx">x</span> <span class="o">>=</span> <span class="mi">50</span> <span class="err">?</span> <span class="s">"more than 50"</span> <span class="p">:</span>
<span class="nx">x</span> <span class="o">>=</span> <span class="mi">10</span> <span class="err">?</span> <span class="s">"more than 10"</span> <span class="p">:</span> <span class="s">"less than 10"</span><span class="p">;</span>
<span class="nb">println</span><span class="p">(</span><span class="s">"The output from nested ternary expression: "</span> <span class="o">+</span> <span class="nx">nestedOutput</span><span class="p">);</span>
<span class="p">}</span>
</pre></div>
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<td class="docs">
</td>
<td class="code">
<div class="highlight"><pre><span class="gp">$</span> ballerina run ternary.bal
<span class="go">The output from If-Else: less than 50</span>
<span class="go">The output from Ternary expression: less than 50</span>
<span class="go">The output from nested ternary expression: more than 10</span>
</pre></div>
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Next example: <a href="functions">Functions</a>.
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