Add 2 Numbers using a Function Input Number 1 Input Number 2 Call a function that adds these numbers Write the answer out to screen.

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Presentation transcript:

Add 2 Numbers using a Function Input Number 1 Input Number 2 Call a function that adds these numbers Write the answer out to screen

Step 1: Put in tags

Step 2: Input 2 Numbers number1= prompt("Enter 1st number:", 0); number2= prompt("Enter 2nd number:", 0);

Step 3: Create a function to add 2 numbers function Add2Numbers(number1, number2) { total=number1+number2; } number1= prompt("Enter 1st number:", 0); number2= prompt("Enter 2nd number:", 0);

Step 4: Call the Function function Add2Numbers(number1, number2) { total=number1+number2; } number1= prompt("Enter 1st number:", 0); number2= prompt("Enter 2nd number:", 0); Add2Numbers(number1, number2);

Step 5: Write the answer out to screen function Add2Numbers(number1, number2) { total=number1+number2; } number1= prompt("Enter 1st number:", 0); number2= prompt("Enter 2nd number:", 0); Add2Numbers(number1, number2); document.write("The sum of the numbers you entered is: "+total);

Step 5: Write the answer out to screen total=0; function Add2Numbers(number1, number2) { total=number1+number2; } number1= prompt("Enter 1st number:", 0); number2= prompt("Enter 2nd number:", 0); Add2Numbers(number1, number2); document.write("The sum of the numbers you entered is: "+total); Problem!!! The output of this program is (with input 1,2): The sum of the numbers you entered is: is the wrong answer, it should be 3 How do we fix this??

Step 6: Fix the problem total=0; function Add2Numbers(number1, number2) { total=number1+number2; } number1= prompt("Enter 1st number:", 0); number2= prompt("Enter 2nd number:", 0); number1=parseInt(number1); number2=parseInt(number2); Add2Numbers(number1, number2); document.write("The sum of the numbers you entered is: "+total);