Question

Write a JavaScript program to calculate Area of a trapezoid
Equation: Area = (top side + bottom side) * height / 2
1. Use prompt() function to take top side, bottom side, and height values from user
2. For validation, if user did not put in a number, your program must send out
3. "Input must be number" error message using alert() function.
4. If user put in all numbers, use alert() function to output correct answer

Answer 1

Java Script program:

var top = parseInt(prompt("Enter top side of Trapazoid : "));

var bottom = parseInt(prompt("Enter bottom side of Trapazoid : "));

var height = parseInt(prompt("Enter height of Trapazoid : "));

var area = (top+bottom)*height/2;

if(isNaN(top)|| isNaN(bottom)||isNaN(height))

alert("Input must be number");

else

alert("The area of trapazoid is "+area);

  

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