55 lines
1.5 KiB
Markdown
55 lines
1.5 KiB
Markdown
# Assignment Operator
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Set the value for local and global variables #docs #assignment #language #var #data
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### @parent js/operators
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Set or change the value of a variable
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### Block Editor
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### Touch Develop
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Use the assignment operator (:=) to set or change the value of a [local variable](/microbit/reference/variables/var) or a [global variable](/microbit/js/data).
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### Declare a variable
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Declare a new *local* variable using the [var](/microbit/reference/variables/var) statement and the assignment operator (`:=`). Like this:
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```blocks
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let num1 = 7
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let name = "Joe"
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```
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The variable's name is on the left of the assignment operator (`:=`) and the variable's value is on the right:
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*variable name* `:=` *value*
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See [global variable](/microbit/js/data) for info on declaring a global variable.
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### Change a variable
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After a global or local variable is defined, use the assignment operator (`:=`) to change the variable's value.
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```
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g = 42
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num1 = 42
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```
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### Notes
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* Don't confuse the assignment operator `:=` with the equality operator `=`, which is used to compare values.
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* You can use the assignment operator `:=` with variables of each of the supported [types](/microbit/js/types).
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### Lessons
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[counter](/microbit/lessons/counter), [rotation animation](/microbit/lessons/rotation-animation), [digital pet](/microbit/lessons/digital-pet), [offset image](/microbit/lessons/offset-image)
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### See also
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[local variables](/microbit/reference/variables/var), [global variables](/microbit/js/data), [types](/microbit/js/types)
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