JavaScript Question Practice For Logic Building || JS QNA

 JavaScript Question Practice For Logic Building 

 Q .  Write a JavaScript program to check whether

         a given integer is within 20 of 100 or 400.

     solution

    function testhundred(x) {

      return ((Math.abs(100 - x) <= 20) ||

       (Math.abs(400 - x) <= 20));

    }

    console.log(testhundred(10));

    console.log(testhundred(90));

     

     Q .  Write a JavaScript program to check two given

     integers whether one is positive and another one is negative.  

    solution

    function check(a,b){

      if((a < 0 && b > 0) || a > 0 && b < 0) {

        return true ;

      }

      else{

        return false;

      }

    }

    console.log(check(2,2))

    console.log(check(2,-2))

    console.log(check(-2,2))

    console.log(check(-2,-2))

     

     Q. Write a JavaScript program to create another string

    by adding "Py" in front of a given string. If the given

    string begins with "Py" return the original string.

     Solution

    function string_check(str1) {

    if (str1 === null || str1 === undefined || str1.substring(0, 2) === 'Py')

      {

        return str1;

      }

      return "Py"+str1;

    }

   

    console.log(string_check("Python"));

    console.log(string_check("thon"));

   

    Q . Write a JavaScript program to remove a character at the

   specified position in a given string and return the modified string

    Solution

    function removestr(){

      let str1 = "Hi getcodr" ;

      let str2 = str1.replace('Hi ','') ;

      return str2 ;

    }

    console.log(removestr()) ;

   

    Q. Write a JavaScript program to create a new string from a

       given string by changing the position of the first and last

     characters. The string length must be broader than or equal to 1.

    Solution

      function first_last(str1){

      if(str1.length <= 1){

        return str1 ;

      }

      newstr = str1.substring(1, str1.length - 1) ;

      return (str1.charAt(str1.length - 1)) + newstr + str1.charAt(0) ;

    }

    console.log(first_last('ram'));