pxt-calliope/docs/reference/variables/change-var.md

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# Change Value
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Set the value for local and global variables.
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### @parent blocks/change-value
Change the value of a variable
```blocks
let x = 0
x += 1
```
### Declare a variable
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Use the assignment operator to set the value of a [variable](/reference/variables/var). Change the value of a variable from 0 to 1 using the change item block. Like this:
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```blocks
let x = 0
x += 1
```
### Example
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Use the assignment operator to set the value of a [variable](/reference/variables/var). Change the value of a variable from 0 to 1 using the change item block. Then display the new value of the variable on the LED screen. Like this:
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```blocks
let x = 0;
x += 1;
basic.showNumber(x);
```
### Notes
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* You can use the assignment operator with variables of each of the supported [types](/blocks/types).
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### See also
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[variable](/reference/variables/var), [types](/blocks/types)
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