- Getting Started
- Variables and Types
- Manipulating Arrays
- Function Context
The addition operator
+ (addition) operator is used both addition and concatenation of strings.
For example, adding two variables is easy:
var a = 1; var b = 2; var c = a + b; // c is now equal to 3
The addition operator is used for concatenating strings to strings, strings to numbers, and numbers to strings:
var name = "John"; print("Hello " + name + "!"); print("The meaning of life is " + 42); print(42 + " is the meaning of life");
To subtract, multiply and divide two numbers, use the minus (
-), asterisk (
*) and slash (
print(3 - 5); // outputs -2 print(3 * 5); // outputs 15 print(3 / 5); // outputs 0.6
Advanced mathematical operators
%) which calculates the remainder of a division operation.
print(5 % 3); // outputs 2
Instead of typing something like myNumber=myNumber*2, you can use myNumber*=2. There are the following shortcuts like that: *= -= += /=
Math module which contains more advanced functions:
Math.abscalculates the absolute value of a number
Math.expcalculates e to the power of a number
Math.pow(x,y)calculates the result of x to the power of y
Math.floorremoves the fraction part from a number
Math.random()will give a random number
And many more mathematical functions.
In this exercise, you do the following:
- Connect the
lastNameto construct the variable
fullName, but with a space (
" ") in between the first and last name.
- Multiply the variable
myNumberby 2 and put the result in
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