How to check whether a string is numeric using Apex in Salesforce?

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How to check whether a string is numeric using Apex in Salesforce?

Magulan Duraipandian

isNumeric() can be used to check whether a string is numeric using Apex in Salesforce.

Sample Code:

String str = 'abc';   

if ( str.isNumeric() ) {
        
    Integer intVal = Integer.ValueOf( str );
    System.debug( 'intVal value is ' + intVal );
    
} else {
    
    System.debug( 'String ' + str + ' is not numeric' );
    
}

Output:

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