How to check if input is a number and call a function accordingly?

Question

I have my code below..I need to modify it so that the input is checked if it is number.If its not a number, then a message has to be displayed as follows \" please enter only no

Answer 1

have you tried "typeof"?

if ( typeof entered_num  === "number" ) {..} 
else { //not a number }

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof