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|| : Logical OR Operator

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Summary

Combine two boolean expressions. Returns true if at least one operand is true.

Syntax

Precedence

Priority level in expression evaluation (1 = highest, 10 = lowest): 10 (lowest)

Evaluated after: All other operators

Operands

Position Type Description
Left Boolean First condition to evaluate
Right Boolean Second condition to evaluate

Returns

Type: Boolean

true if either operand is true, false only if both are false.

Truth Table

Left Right Result
true true true
true false true
false true true
false false false

Examples

Administrative Access 


  <div class="admin-panel">
    <h2>Administration</h2>
    <p>Access Level: </p>
  </div>

  <div class="user-panel">
    <h2>User Dashboard</h2>
  </div>

Data:

doc.Params["model"] = new {
    isAdmin = false,
    isModerator = true
};

Output:

<div class="admin-panel">
  <h2>Administration</h2>
  <p>Access Level: Moderator</p>
</div>

Multiple Status Check 


  <div class="order-completed">
    <p>✓ Order in transit or completed</p>
    <p>Status: </p>
  </div>

  <div class="order-processing">
    <p>Order being prepared</p>
    <p>Status: </p>
  </div>

Data:

doc.Params["model"] = new {
    status = "shipped"
};

Output:

<div class="order-completed">
  <p>✓ Order in transit or completed</p>
  <p>Status: shipped</p>
</div>

Weekend Detector 


  <div class="weekend">
    <h3>Weekend Hours</h3>
    <p>10:00 AM - 6:00 PM</p>
  </div>

  <div class="weekday">
    <h3>Weekday Hours</h3>
    <p>8:00 AM - 8:00 PM</p>
  </div>

Alert Conditions 


  
    <div class="alert-warning">
      <strong></strong>
      
        <p>⚠ Low stock:  units</p>
      
      
        <p>⚠ Expiring soon:  days</p>
      
    </div>

Data:

doc.Params["model"] = new {
    items = new[] {
        new { name = "Item A", stock = 5, expirationDays = 60 },
        new { name = "Item B", stock = 50, expirationDays = 15 },
        new { name = "Item C", stock = 8, expirationDays = 10 }
    }
};

Output:

<div class="alert-warning">
  <strong>Item A</strong>
  <p>⚠ Low stock: 5 units</p>
</div>
<div class="alert-warning">
  <strong>Item B</strong>
  <p>⚠ Expiring soon: 15 days</p>
</div>
<div class="alert-warning">
  <strong>Item C</strong>
  <p>⚠ Low stock: 8 units</p>
  <p>⚠ Expiring soon: 10 days</p>
</div>

Role-Based Display 


  <div class="leadership-tools">
    <h3>Leadership Dashboard</h3>
    <p>Role: </p>
  </div>

Priority Orders 


  <div class="expedited-processing">
    <strong>Expedited Processing</strong>
    
      <p>High-value order</p>
    
    
      <p>Priority flagged</p>
    
    
      <p>VIP customer</p>
    
  </div>

Notes

  • Returns true if either or both conditions are true
  • Uses short-circuit evaluation: if first condition is true, second is not evaluated
  • Can chain multiple OR conditions: a || b || c
  • Has lowest precedence - use parentheses for complex expressions: (a || b) && c
  • Commonly used for checking multiple acceptable values
  • Opposite of AND (&&) operator logic
  • Note: ! (NOT) operator is not supported - use != instead

See Also