mirror of
https://github.com/notwa/rc
synced 2024-11-05 03:39:02 -08:00
23 lines
457 B
Bash
23 lines
457 B
Bash
#!/usr/bin/env sh
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# YES_ZSH
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# YES_BASH
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# YES_DASH
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sum() { ### @-
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### compute the summation of its arguments without forking processes.
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### this relies on the shell's built-in arithmetic operators.
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###
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### ```
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### $ sum 1 2 3
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### 6
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### ```
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###
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### **TODO:** consider renaming because sum(1) already exists.
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local sum=0
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for i; do
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: $((sum+=i))
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done
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echo "$sum"
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}
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[ -n "${preload+-}" ] || sum "$@"
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