string is number javascript code example
Example 1: javascript check if string is number
isNaN(num)
function isNumeric(num){
return !isNaN(num)
}
isNumeric(123)
isNumeric('123')
isNumeric('1e10000')
isNumeric('foo')
isNumeric('10px')
Example 2: js is number
Number.isInteger(value)
Example 3: javascript is variable a string
if (typeof myVar === 'string'){
}
Example 4: js string have number js
var hasNumber = /\d/;
hasNumber.test("ABC33SDF");
hasNumber.test("ABCSDF");
Example 5: javascript check if string is number
function isNumeric(num){
return !isNaN(num)
}
isNumeric("23.33");
Example 6: js check if string or int
var myString = "abc123";
var otherString = "123";
Number.isInteger(myString);
Number.isInteger(otherString);