Variables in Nim can be declared with var and let
statements.
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var statement declares a mutable variable.
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var counter = 1
inc counter
echo counter
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let statement declares an immutable variable.
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let name = "Jeremy"
echo name
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let x = 15
echo x
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| Modifying an immutable variable will not work. |
# name = "Jerry"
# inc x
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| Variable type can be explicity declared. |
var long_number: int64 = 335_811
echo long_number
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Multiple variables can be declared with a single
var/let statement using indentation.
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var
a = 1
b = 2.5
c = "clouds"
echo a, ", ", b, ", ", c
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| Variables declared without an initial value are zero-valued. Without initialization, the type of the variable must be declared. |
var num1: int
echo num1
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Variables declared with let statement require initialization.
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let num2 = 15
echo num2
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$ nim c -r variables.nim 2 Jeremy 15 335811 1, 2.5, clouds 0 15 |
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