Question

How to check if a character in a string is numeric with JavaScript

Answer 1

const str = 'javascript 890';

const character = str[12];

if (!isNaN(character * 1)) {
    console.log('character is numeric');
}

  
  
/*
run:
        
character is numeric
      
*/

 

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Answer 2

const str = 'javascript 890';

const character = str[12];

if (character >= '0' && character <= '9') {
    console.log('character is numeric');
}

  
  
/*
run:
        
character is numeric
      
*/

 

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Answer 3

function isnumeric(ch) {
    return  ch.match(/[0-9]/i);
}

const str = 'javascript 890';

const character = str[12];

if (isnumeric(character)) {
    console.log('character is numeric');
}

  
  
/*
run:
        
character is numeric
      
*/

 

70+ SQL courses for beginners and professionals