You want to set the variable $category to 'Senior' if $age is 65 or older, 'Adult' if between 18 and 64, and 'Child' otherwise. Which PHP code correctly uses nested ternary operators to achieve this?

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PHP - Conditional Statements

You want to set the variable $category to 'Senior' if $age is 65 or older, 'Adult' if between 18 and 64, and 'Child' otherwise. Which PHP code correctly uses nested ternary operators to achieve this?

A$category = ($age >= 65) ? 'Senior' : (($age >= 18) ? 'Adult' : 'Child');

B$category = ($age >= 65) ? 'Senior' : ($age >= 18) ? 'Adult' : 'Child';

C$category = $age >= 65 ? 'Senior' : 'Adult' ? $age >= 18 : 'Child';

D$category = ($age >= 65) ? 'Senior' : ($age < 18) ? 'Child' : 'Adult';

Step-by-Step Solution

Solution:

Step 1: Understand the conditions
We need to check if age is 65 or more, then 18 or more, else child.
Step 2: Analyze nested ternary usage
$category = ($age >= 65) ? 'Senior' : (($age >= 18) ? 'Adult' : 'Child'); correctly nests the ternary operators with parentheses to ensure proper evaluation order.
Step 3: Check other options
$category = ($age >= 65) ? 'Senior' : ($age >= 18) ? 'Adult' : 'Child'; lacks parentheses, which can cause ambiguity. $category = $age >= 65 ? 'Senior' : 'Adult' ? $age >= 18 : 'Child'; has incorrect syntax. $category = ($age >= 65) ? 'Senior' : ($age < 18) ? 'Child' : 'Adult'; reverses conditions incorrectly.
Final Answer:
$category = ($age >= 65) ? 'Senior' : (($age >= 18) ? 'Adult' : 'Child'); -> Option A
Quick Check:
Use parentheses to clarify nested ternary [OK]

Quick Trick: Always parenthesize nested ternary conditions [OK]

Common Mistakes:

Omitting parentheses in nested ternary expressions
Incorrect order of conditions
Misplacing colons and question marks

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You want to set the variable $category to 'Senior' if $age is 65 or older, 'Adult' if between 18 and 64, and 'Child' otherwise. Which PHP code correctly uses nested ternary operators to achieve this?

Step 1: Understand the conditions

Step 2: Analyze nested ternary usage

Step 3: Check other options

Final Answer:

Quick Check:

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