pxt-calliope/docs/blocks/variables.md

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## Variables
[Assign](/blocks/variables/assign) (set) a variable's value
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```blocks
let x = 0;
```
Get a variable's value
```blocks
let x = 0;
x;
```
[Change](/blocks/variables/change-var) a variable's value
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```blocks
let x = 0;
x+=1;
```