isInteger(value, [minValue], [maxValue]) Last updated: 30. May 2026

Checks if specified value is an int.

Parameters

Name	Type	Description
value	object	Value to validate.
minValue (optional)	number	Specify a minimum value for the number or "null" to skip.
maxValue (optional)	number	Specify a maximum value for the number or "null" to skip.

Returns

Returns true if the value is an integer (within the specified range), otherwise false.

Example

Code example (JS)

JS is normal JavaScript either running in the browser or on the Docly™ server.

let t = "5.5";

if (!docly.isInteger(t))
    write("'" + t+ "' is not an integer \n");

let n = "123";
if (docly.isInteger(n, 100, 200))
    write("123 is an integer between 100 and 200\n");
    
if (!docly.isInteger(n, 1, 10))
    write("123 is NOT a integer between 1 and 10");

Output

The JS code above produces the output shown below:

'5.5' is not an integer 
123 is an integer between 100 and 200
123 is NOT a integer between 1 and 10