check if string is int js 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: javascript is variable a string
if (typeof myVar === 'string'){
}
Example 3: javascript check if a value is an int
Number.isInteger(2);
Number.isInteger(90);
Number.isInteger("37");
Number.isInteger(false);
Example 4: javascript check if string is number
function isNumeric(num){
return !isNaN(num)
}
isNumeric("23.33");
Example 5: js check if string is integer
function isInt(str) {
return !isNaN(str) && Number.isInteger(parseFloat(str));
}