Question

How to check whether a string contains only digits in TypeScript

Answer 1

function hasOnlyDigits(str : string) {
    return str.match(/^[0-9]+$/) != null
}
  
  
console.log(hasOnlyDigits("typescript")); 
  
console.log(hasOnlyDigits("typescript 2024"));
  
console.log(hasOnlyDigits("948238"));
  
 
      
      
/*
run:
      
false
false
true
      
*/

 

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Answer 2

function hasOnlyDigits(str : string) {
    return /^\d+$/.test(str);
}
  
  
console.log(hasOnlyDigits("typescript")); 
  
console.log(hasOnlyDigits("typescript 2024"));
  
console.log(hasOnlyDigits("1092834"));
  
 
      
      
/*
run:
      
false
false
true
      
*/

 

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