31 lines
343 B
Bash
31 lines
343 B
Bash
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#!/usr/bin/env bash
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a=10
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b=20
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echo "a=$a, b=$b"
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val=`expr $a + $b`
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echo "a + b : $val"
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val=`expr $a - $b`
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echo "a - b : $val"
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val=`expr $a \* $b`
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echo "a * b : $val"
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val=`expr $b / $a`
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echo "b / a : $val"
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val=`expr $b % $a`
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echo "b % a : $val"
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if [ $a == $b ]
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then
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echo "a 等于 b"
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fi
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if [ $a != $b ]
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then
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echo "a 不等于 b"
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fi
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