ebalovo #!/bin/bash read x read y [[ $x -gt $y ]] && echo 'X is greater than Y' [[ $x -eq $y ]] && echo 'X is equal to Y' [[ $x -lt $y ]] && echo 'X is less than Y'
thien997 What does the && do between the test statement and echo statement?
Trojka boolean test .. if A=true then B...
anthony_owen Yes and don't forget this is about command flow execution. So if the first command executes successfully "then" execute the second command.
rushughes elegant, i love it
prashant08 I guess in this, all the three comparison will be done even if first is satisfied. If it is done through if elif then as soon as the condition is satisfied, rest of the conditions aren't checked for.
enilaydagdemir Here is my solution!
read firstNumber read secondNumber if (($firstNumber > $secondNumber)); then echo X is greater than Y; elif (($firstNumber < $secondNumber)); then echo X is less than Y; else echo X is equal to Y; fi
catpin Pretty much snap!
#!/bin/bash read X read Y if (( $X > $Y )); then printf "X is greater than Y" elif (( $X == $Y )); then printf "X is equal to Y" else printf "X is less than Y" fi
13424lcb it canbe more simplify by remove '$':
read X read Y if (( X > Y )); then printf "X is greater than Y" elif (( X == Y )); then printf "X is equal to Y" else printf "X is less than Y" fi
sparsh_maheswari What is the use of fi ?
dk_oder fi indicates the end of if block.
dnovosard #!/bin/bash read X read Y if(($X > $Y)); then echo X is greater than Y; fi if(($X == $Y)); then echo X is equal to Y; fi if(($X < $Y)); then echo X is less than Y; fi
domingos_paraiso Just for fun
#!/bin/bash declare -i X; declare -i Y; read X; read Y; echo "X is $( ([ $X -gt $Y ] && echo greater than) || ([ $X -lt $Y ] && echo less than) || ([ $X -eq $Y ] && echo equal to) ) Y"
mvbelgaonkar Nicely put.
rajujnvgupta hey ! it's great
x0r19x91 Without conditionals
#!/bin/bash read x read y result=( `printf "%s\n" "$x"{\>,\==,\<}"($y)" | bc` ) offset=$(( ${result[1]} + 2*${result[2]} )) answers=( "X is greater than Y" "X is equal to Y" "X is less than Y" ) echo ${answers[$offset]}
maniibi looks beautiful.. please explain
x0r19x91 In line 3, I'm storing the results of X>Y, X==Y, X<Y in $result as an array. If the result is (1, 0, 0) -> print 'X > Y' (0, 1, 0) -> print 'X == Y' (0, 0, 1) -> print 'X < Y' Let's define a function that maps the tuple into an integer offset f(1, 0, 0) = 0 // "X > Y" i.e. ${answers[0]} f(0, 1, 0) = 1 // "X == Y" i.e. ${answers[1]} f(0, 0, 1) = 2 // "X < Y" i.e. ${answers[2]} So we can see that f(x, y, z) = x*0 + y*1 + z*2 = y+2z
maniibi line third is bit confusing.. explain how it works. fourth line is fine. You are calculating offset using the values at diff index. last line,is it kind of string array?? with size 3.
x0r19x91 Brace expansion is resolved first by bash. since x,y can be negative, I put y in parentheses so as to distinguish the - sign and the comparison operator. the brace expansion produces X>Y, X==Y, X<Y. You need to escape the operators. printf with "%s\n" returns the above strings separated by newline. These strings are passed to bc which evaluates and returns the comparison results. The outer parentheses converts the results returned by bc into an array.
maniibi tell.. where did you learn all this from and the strategy also.
seolocals Edit: I solved it already. This is the answer.
read -p number X read -p number Y if ((X > Y)); then echo "X is greater than Y" elif ((X < Y)) then echo "X is less than Y" else echo "X is equal to Y" fi
danielgcwik thanks that worked
mmshaban How come you didn't need the "$" infront of the X and the Y in "if ((X > Y))" ?
a2435 According to multiple manuals I can use input in a way like:
#!/bin/bash read X Y;
However my script doesn't pass all test scenarios. And everything is ok when I change it just to:
#!/bin/bash read X; read Y;
Now all test cases passed successfully. Took half an hour to figure it out here :)
x0r19x91 #!/bin/bash export IFS=$' ' read X Y
themohitpapneja read x read y if ((x>y)); then echo "X is greater than Y " elif ((x==y)); then echo "X is equal to Y" else echo "X is less than Y" fi
this is my answer.hope it hepls
rkyadav018 my simple solution
read X read Y if (( Y )) then echo "X is less than Y" elif (( Y )) then echo "X is greater than Y" else echo "X is equal to Y" fi
ysshah66 #!/bash/bin read x read y if [ "`$x" -gt "$`y" ] 2>/dev/null; then echo "X is greater than Y" elif [ "`$x" -lt "$`y" ] 2>/dev/null; then echo "X is less than Y" else echo "X is equal to Y" fi
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