mirror of https://github.com/tLDP/LDP
37 lines
667 B
Bash
37 lines
667 B
Bash
#!/bin/bash
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a=4
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b=5
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# Here "a" and "b" can be treated either as integers or strings.
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# There is some blurring between the arithmetic and string comparisons,
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#+ since Bash variables are not strongly typed.
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# Bash permits integer operations and comparisons on variables
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#+ whose value consists of all-integer characters.
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# Caution advised, however.
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echo
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if [ "$a" -ne "$b" ]
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then
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echo "$a is not equal to $b"
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echo "(arithmetic comparison)"
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fi
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echo
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if [ "$a" != "$b" ]
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then
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echo "$a is not equal to $b."
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echo "(string comparison)"
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# "4" != "5"
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# ASCII 52 != ASCII 53
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fi
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# In this particular instance, both "-ne" and "!=" work.
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echo
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exit 0
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