how to check if number is integer code example
Example 1: integer check in javascript
var a=Number.isInteger(5);
var b= Number.isInteger(01);
var c=Number.isInteger("10");
console.log(a,b,c);
Example 2: javascript check if number
function isNumber(n) { return /^-?[\d.]+(?:e-?\d+)?$/.test(n); }
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isNumber('123');
isNumber('123abc');
isNumber(5);
isNumber('q345');
isNumber(null);
isNumber(undefined);
isNumber(false);
isNumber(' ');
Example 3: how to check if number is integer in java
if(x == (int)x){
println("x is an integer");
}
Example 4: algorithm to know if a number is an integer
if (num != Math.floor(num)) { ... }