Check if String is a Positive Integer in JavaScript-Code Examples
Check if String is a Positive Integer in JavaScript
JavaScript by Radu TM • June 21, 2022
const isPositiveInteger = (str) => {
// if the input string is not a positive integer, return false
if (!/^\d+$/.test(str)) return false;
// otherwise, return true
return true;
}0
20.069
Check if String is a Positive Integer in JavaScript
JavaScript by Radu TM • June 21, 2022
const isPositiveInteger = (str) => {
// if string is empty, it's not a positive integer
if (str === '') return false;
// if string includes anything other than digits, it's not a positive integer
for (const char of str) {
if (!/\d/.test(char)) return false;
}
// if string starts with '0', it's not a positive integer
if (str.startsWith('0')) return false;
// string is a positive integer
return true;
};0
20.069
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