test.js

/*
1- Write a JavaScript program to know if the input is + or - , " 0 considered as + "?
*/
  console.log('task 1 solution:');
  alert('test  possitive or negative number');
 var num_test =prompt('please enter your number');
  if (num_test>=0){console.log('the input number is possitive '+ num_test);}
  else{console.log('the input number is negative '+num_test);}
  
/*
2- Write a JavaScript program takes 3 input from the user and print the max on the console?
*/
console.log('task 2 solution:');
alert('enter three numbers to find the max');
 var num1 = prompt('please enter first numbers');
 var num2 = prompt('please enter second numbers');
 var num3 = prompt('please enter thired numbers');
 console.log ('the numbers are ');
 console.log(num1);
 console.log(num2);
 console.log(num3);
 if (num1 > num2 && num1 > num3)
 {console.log ('the max number is '+ num1);}
 else if(num2 > num1 && num2 > num3)
 {console.log('the max number is '+ num2);}
 else console.log ('the max number is '+ num3)
/*
3- Write a JavaScript for loop that will iterate from 0 to 20. For each iteration, 
it will check if the current number is odd or even, and display a message on the console?*/
 console.log('task 3 solution:');
 alert('you will enter 20 numbers to check odd or even ');
  for (var i=0;i<20;i++)
 {
  var x=prompt('please enter your number');
  if ((x % 2) == 0 || x== 0)
 { console.log (x+' even number');}
 else console.log(x+' odd number')
  }
/*
4- Write a JavaScript program to calculate the sum of even numbers from 1-100 ?
*/
 console.log('task 4 solution:');
 alert('we will find the summation of even numbers from 1-100');
 var sumeven = 0 ;
 for (var i=1; i<= 100; i++)
 {
 if ((i % 2)==0)
 {sumeven=sumeven+ i ; }
 }
 console.log('the summition of even number from 1-100 is : ' + sumeven);

/*
5- Write a JavaScript program to take 2 numbers from the user and print 
ex:-
num1 = 3
num2 = 3
the sum is 6
the multiplication is 9
*/
 console.log('task 5 solution:');
 alert('enter two numbers to find the summation and multiplication')
  var y = parseInt(prompt('please enter first numbers'));
  var z = parseInt(prompt('please enter second numbers'));
  console.log ('num1 = ' + y) ;
  console.log ('num2 = '+ z);
  var sum = (y + z);
  console.log('the sum is ' + sum)  ;
  var multi =y*z ;
 console.log ('the multiplication is '+ multi) ;