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       Default.md (1425B)
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            1 ---
            2 title: compare.Default
            3 description: Returns the second argument if set, else the first argument.
            4 keywords: []
            5 params:
            6   functions_and_methods:
            7     aliases: [default]
            8     returnType: any
            9     signatures: [compare.Default DEFAULT INPUT]
           10 aliases: [/functions/default]
           11 ---
           12 
           13 The `default` function returns the second argument if set, else the first argument.
           14 
           15 > [!note]
           16 > When the second argument is the boolean `false` value, the `default` function returns `false`. All _other_ falsy values are considered unset.
           17 >
           18 > The falsy values are `false`, `0`, any `nil` pointer or interface value, any array, slice, map, or string of length zero, and zero `time.Time` values.
           19 >
           20 > Everything else is truthy.
           21 >
           22 > To set a default value based on truthiness, use the [`or`] operator instead.
           23 
           24 The `default` function returns the second argument if set:
           25 
           26 ```go-html-template
           27 {{ default 42 1 }} → 1
           28 {{ default 42 "foo" }} → foo
           29 {{ default 42 (dict "k" "v") }} → map[k:v]
           30 {{ default 42 (slice "a" "b") }} → [a b]
           31 {{ default 42 true }} → true
           32 
           33 <!-- As noted above, the boolean "false" is considered set -->
           34 {{ default 42 false }} → false
           35 ```
           36 
           37 The `default` function returns the first argument if the second argument is not set:
           38 
           39 ```go-html-template
           40 {{ default 42 0 }} → 42
           41 {{ default 42 "" }} → 42
           42 {{ default 42 dict }} → 42
           43 {{ default 42 slice }} → 42
           44 {{ default 42 <nil> }} → 42
           45 ```
           46 
           47 [`or`]: /functions/go-template/or/