The operator = is used to assign values.

The operator + is used to add values.

The assignment operator **=** is used to assign values to JavaScript variables.

The arithmetic operator + is used to add values together.

y=5; |

The value of x, after the execution of the statements above is 7.

## JavaScript Arithmetic Operators

Arithmetic operators are used to perform arithmetic between variables and/or values.

Given that **y=5**, the table below explains the arithmetic operators:

Operator | Description | Example | Result |
---|---|---|---|

+ | Addition | x=y+2 | x=7 |

- | Subtraction | x=y-2 | x=3 |

* | Multiplication | x=y*2 | x=10 |

/ | Division | x=y/2 | x=2.5 |

% | Modulus (division remainder) | x=y%2 | x=1 |

++ | Increment | x=++y | x=6 |

-- | Decrement | x=--y | x=4 |

## JavaScript Assignment Operators

Assignment operators are used to assign values to JavaScript variables.

Given that **x=10** and **y=5**, the table below explains the assignment operators:

Operator | Example | Same As | Result |
---|---|---|---|

= | x=y | x=5 | |

+= | x+=y | x=x+y | x=15 |

-= | x-=y | x=x-y | x=5 |

*= | x*=y | x=x*y | x=50 |

/= | x/=y | x=x/y | x=2 |

%= | x%=y | x=x%y | x=0 |

## The + Operator Used on Strings

The + operator can also be used to add string variables or text values together.

To add two or more string variables together, use the + operator.

txt1="What a very"; |

After the execution of the statements above, the variable txt3 contains "What a verynice day".

To add a space between the two strings, insert a space into one of the strings:

txt1="What a very "; |

or insert a space into the expression:

txt1="What a very"; |

After the execution of the statements above, the variable txt3 contains:

"What a very nice day"

## Adding Strings and Numbers

Look at these examples:

x=5+5; |

http://www.w3schools.com

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