Shell program to print the first and last parameter and their sum

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I want to make a shell program which prints out the first and the last parameter, then it prints out their sum. Here is my code, but it gives an error and doesn't work, can anybody help?

echo "How many parameters do you want?"
read param
echo "You entered $param parameters"
first = $param
last = `echo $*|cut –f$# -d" "`
sum = `$first + $last`
echo "The sum of the two parameters are $sum"

asked Nov 11 at 0:01

Tyler Joe

686

What error do you get? Which line?
– Alex
Nov 11 at 2:29

add a comment |

up vote
0
down vote

favorite

I want to make a shell program which prints out the first and the last parameter, then it prints out their sum. Here is my code, but it gives an error and doesn't work, can anybody help?

echo "How many parameters do you want?"
read param
echo "You entered $param parameters"
first = $param
last = `echo $*|cut –f$# -d" "`
sum = `$first + $last`
echo "The sum of the two parameters are $sum"

asked Nov 11 at 0:01

Tyler Joe

686

What error do you get? Which line?
– Alex
Nov 11 at 2:29

add a comment |

up vote
0
down vote

favorite

I want to make a shell program which prints out the first and the last parameter, then it prints out their sum. Here is my code, but it gives an error and doesn't work, can anybody help?

echo "How many parameters do you want?"
read param
echo "You entered $param parameters"
first = $param
last = `echo $*|cut –f$# -d" "`
sum = `$first + $last`
echo "The sum of the two parameters are $sum"

asked Nov 11 at 0:01

Tyler Joe

686

I want to make a shell program which prints out the first and the last parameter, then it prints out their sum. Here is my code, but it gives an error and doesn't work, can anybody help?

echo "How many parameters do you want?"
read param
echo "You entered $param parameters"
first = $param
last = `echo $*|cut –f$# -d" "`
sum = `$first + $last`
echo "The sum of the two parameters are $sum"

shell scripting

asked Nov 11 at 0:01

Tyler Joe

686

asked Nov 11 at 0:01

Tyler Joe

686

asked Nov 11 at 0:01

Tyler Joe

686

asked Nov 11 at 0:01

Tyler Joe

686

asked Nov 11 at 0:01

Tyler Joe

686

What error do you get? Which line?
– Alex
Nov 11 at 2:29

add a comment |

What error do you get? Which line?
– Alex
Nov 11 at 2:29

What error do you get? Which line?
– Alex
Nov 11 at 2:29

add a comment |

1 Answer
1

active

oldest

votes

up vote
0
down vote

accepted

Here is an approach for you:

first="$1"
last="$@: -1"
echo "first: $first"
echo "last: $last"
sum=$((first + last))
echo "The sum of the two parameters are $sum"

You can run like this:

./program.sh 1 2 3 4 
first: 1
last: 4
The sum of the two parameters are 5

answered Nov 11 at 3:32

sirandy

1,51731623

Be aware this will only work with integers.
– kvantour
Nov 15 at 15:37

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
0
down vote

accepted

Here is an approach for you:

first="$1"
last="$@: -1"
echo "first: $first"
echo "last: $last"
sum=$((first + last))
echo "The sum of the two parameters are $sum"

You can run like this:

./program.sh 1 2 3 4 
first: 1
last: 4
The sum of the two parameters are 5

answered Nov 11 at 3:32

sirandy

1,51731623

Be aware this will only work with integers.
– kvantour
Nov 15 at 15:37

add a comment |

up vote
0
down vote

accepted

Here is an approach for you:

first="$1"
last="$@: -1"
echo "first: $first"
echo "last: $last"
sum=$((first + last))
echo "The sum of the two parameters are $sum"

You can run like this:

./program.sh 1 2 3 4 
first: 1
last: 4
The sum of the two parameters are 5

answered Nov 11 at 3:32

sirandy

1,51731623

Be aware this will only work with integers.
– kvantour
Nov 15 at 15:37

add a comment |

up vote
0
down vote

accepted

Here is an approach for you:

first="$1"
last="$@: -1"
echo "first: $first"
echo "last: $last"
sum=$((first + last))
echo "The sum of the two parameters are $sum"

You can run like this:

./program.sh 1 2 3 4 
first: 1
last: 4
The sum of the two parameters are 5

answered Nov 11 at 3:32

sirandy

1,51731623

Here is an approach for you:

first="$1"
last="$@: -1"
echo "first: $first"
echo "last: $last"
sum=$((first + last))
echo "The sum of the two parameters are $sum"

You can run like this:

./program.sh 1 2 3 4 
first: 1
last: 4
The sum of the two parameters are 5

answered Nov 11 at 3:32

sirandy

1,51731623

answered Nov 11 at 3:32

sirandy

1,51731623

answered Nov 11 at 3:32

sirandy

1,51731623

answered Nov 11 at 3:32

sirandy

1,51731623

Be aware this will only work with integers.
– kvantour
Nov 15 at 15:37

add a comment |

Be aware this will only work with integers.
– kvantour
Nov 15 at 15:37

Be aware this will only work with integers.
– kvantour
Nov 15 at 15:37

add a comment |

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