mirror of https://github.com/tLDP/LDP
60 lines
981 B
Bash
60 lines
981 B
Bash
#!/bin/bash
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# Multiple ways to count up to 10.
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echo
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# Standard syntax.
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for a in 1 2 3 4 5 6 7 8 9 10
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do
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echo -n "$a "
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done
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echo; echo
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# +==========================================+
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# Using "seq" ...
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for a in `seq 10`
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do
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echo -n "$a "
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done
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echo; echo
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# +==========================================+
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# Using brace expansion ...
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# Bash, version 3+.
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for a in {1..10}
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do
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echo -n "$a "
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done
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echo; echo
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# +==========================================+
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# Now, let's do the same, using C-like syntax.
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LIMIT=10
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for ((a=1; a <= LIMIT ; a++)) # Double parentheses, and naked "LIMIT"
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do
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echo -n "$a "
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done # A construct borrowed from ksh93.
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echo; echo
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# +=========================================================================+
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# Let's use the C "comma operator" to increment two variables simultaneously.
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for ((a=1, b=1; a <= LIMIT ; a++, b++))
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do # The comma concatenates operations.
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echo -n "$a-$b "
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done
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echo; echo
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exit 0
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