{"id":73,"date":"2026-05-20T05:01:26","date_gmt":"2026-05-20T05:01:26","guid":{"rendered":"https:\/\/gigz.pk\/cpp\/?post_type=lesson&#038;p=73"},"modified":"2026-05-22T07:43:00","modified_gmt":"2026-05-22T07:43:00","slug":"logical-operators","status":"publish","type":"lesson","link":"https:\/\/gigz.pk\/cpp\/?lesson=logical-operators","title":{"rendered":"Logical Operators"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Logical operators in C++ are used to combine or reverse conditions. They are mainly used in decision-making statements like <code>if<\/code>, <code>while<\/code>, and loops.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What are Logical Operators?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Logical operators work with boolean expressions and return:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>true<\/code> (1)<\/li>\n\n\n\n<li><code>false<\/code> (0)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">They help combine multiple conditions in a program.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Types of Logical Operators in C++<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Operator<\/th><th>Meaning<\/th><\/tr><\/thead><tbody><tr><td><code>&amp;&amp;<\/code><\/td><td>Logical AND<\/td><\/tr><tr><td>`<\/td><td><\/td><\/tr><tr><td><code>!<\/code><\/td><td>Logical NOT<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Logical AND Operator (&amp;&amp;)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The AND operator returns true only if both conditions are true.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Example<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;<br>using namespace std;<br><br>int main() {<br>    int a = 10;<br>    int b = 5;<br><br>    cout &lt;&lt; (a &gt; 5 &amp;&amp; b &lt; 10);<br><br>    return 0;<br>}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Output<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>1<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Logical OR Operator (||)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The OR operator returns true if at least one condition is true.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Example<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;<br>using namespace std;<br><br>int main() {<br>    int a = 10;<br>    int b = 20;<br><br>    cout &lt;&lt; (a &gt; 5 || b &lt; 10);<br><br>    return 0;<br>}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Output<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>1<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Logical NOT Operator (!)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The NOT operator reverses the result:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>true<\/code> becomes <code>false<\/code><\/li>\n\n\n\n<li><code>false<\/code> becomes <code>true<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Example<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;<br>using namespace std;<br><br>int main() {<br>    bool value = true;<br><br>    cout &lt;&lt; !value;<br><br>    return 0;<br>}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Output<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>0<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Complete Example Program<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;<br>using namespace std;<br><br>int main() {<br>    int age = 20;<br>    int marks = 80;<br><br>    cout &lt;&lt; (age &gt;= 18 &amp;&amp; marks &gt;= 50) &lt;&lt; endl;<br>    cout &lt;&lt; (age &lt; 18 || marks &gt;= 50) &lt;&lt; endl;<br>    cout &lt;&lt; !(age &gt;= 18) &lt;&lt; endl;<br><br>    return 0;<br>}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Output<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>1<br>1<br>0<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Truth Table of Logical Operators<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>A<\/th><th>B<\/th><th>A &amp;&amp; B<\/th><th>A || B<\/th><\/tr><\/thead><tbody><tr><td>0<\/td><td>0<\/td><td>0<\/td><td>0<\/td><\/tr><tr><td>0<\/td><td>1<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>1<\/td><td>0<\/td><td>0<\/td><td>1<\/td><\/tr><tr><td>1<\/td><td>1<\/td><td>1<\/td><td>1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Using Logical Operators in Conditions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Example<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>if (username == \"admin\" &amp;&amp; password == \"1234\") {<br>    cout &lt;&lt; \"Login Successful\";<br>}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Important Points<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Logical operators work with conditions<\/li>\n\n\n\n<li>They return boolean results<\/li>\n\n\n\n<li>Used in decision-making and loops<\/li>\n\n\n\n<li><code>&amp;&amp;<\/code> needs all conditions true<\/li>\n\n\n\n<li><code>||<\/code> needs at least one condition true<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Why Logical Operators are Important<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">They are important because they:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Combine multiple conditions<\/li>\n\n\n\n<li>Control program flow<\/li>\n\n\n\n<li>Help in complex decision-making<\/li>\n\n\n\n<li>Improve programming logic<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Real-Life Example<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Logical operators are used in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Login systems<\/li>\n\n\n\n<li>Exam eligibility checking<\/li>\n\n\n\n<li>Game conditions<\/li>\n\n\n\n<li>Security systems<\/li>\n\n\n\n<li>Banking applications<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Logical operators in C++ are essential for combining and controlling conditions in programs. 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