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Issue 248: listing added in 4.1 #262

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Issue 248: listing added in 4.1 #262

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6e452dc
add listing
habibasorour Jul 28, 2026
3134fb3
add the listing on text
habibasorour Jul 28, 2026
2b3c9ef
fixed a deleted paragraph
habibasorour Jul 28, 2026
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14 changes: 11 additions & 3 deletions source/ch4_conditionals.ptx
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Original file line number Diff line number Diff line change
Expand Up @@ -13,20 +13,26 @@


<p>
In Python the simple <c>if</c> statement is written as:
<xref ref="python-simple-if" text="type-global"/> shows how the simple <c>if</c> statement is written in Python.
</p>

<program xml:id="python-simple-if" interactive="activecode" language="python">
<listing xml:id="python-simple-if">
<program interactive="activecode" language="python">
<code>
score = 95
if score &gt;= 90:
print("Excellent work!")
</code>
</program>
</listing>


<p>
In Java, this same pattern requires two changes: the condition must be in parentheses <c>()</c>, and the code block must be enclosed in curly braces <c>{}</c>.
<xref ref="java-simple-if" text="type-global"/> shows how the simple <c>if</c> statement is written in Java.
</p>
<program xml:id="java-simple-if" interactive="activecode" language="java">
<listing xml:id="java-simple-if">
<program interactive="activecode" language="java">
<code>
public class SimpleIfExample {
public static void main(String[] args) {
Expand All @@ -38,6 +44,8 @@ if score &gt;= 90:
}
</code>
</program>
</listing>

<p>
Once again you can see that in Java the curly braces define a block rather than indentation.
In Java, the parentheses around the condition are required because it is technically a function that evaluates to <c>True</c> or <c>False</c>.
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