Sstrhsrtj

#!/bin/sh --



expression_to_evaluate='12 + 3'



printf '%sn' "Arithemtic Expansion: $(( $expression_to_evaluate ))"



printf '%s' 'bc: '

printf '%sn' "$expression_to_evaluate" | bc



printf '%s' 'awk: '

awk -v expression_to_evaluate="$expression_to_evaluate" -- 'BEGIN{printf "%dn", expression_to_evaluate}'

Arithemtic Expansion: 15

bc: 15

awk: 12

#!/bin/sh --



expression_to_evaluate='12 + 3'



printf '%sn' "Arithemtic Expansion: $(( $expression_to_evaluate ))"



printf '%s' 'bc: '

printf '%sn' "$expression_to_evaluate" | bc



printf '%s' 'awk: '

awk -v expression_to_evaluate="$expression_to_evaluate" -- 'BEGIN{printf "%dn", expression_to_evaluate}'

Arithemtic Expansion: 15

bc: 15

awk: 12

#!/bin/sh --



expression_to_evaluate='12 + 3'



printf '%sn' "Arithemtic Expansion: $(( $expression_to_evaluate ))"



printf '%s' 'bc: '

printf '%sn' "$expression_to_evaluate" | bc



printf '%s' 'awk: '

awk -v expression_to_evaluate="$expression_to_evaluate" -- 'BEGIN{printf "%dn", expression_to_evaluate}'

Arithemtic Expansion: 15

bc: 15

awk: 12

#!/bin/sh --



expression_to_evaluate='12 + 3'



printf '%sn' "Arithemtic Expansion: $(( $expression_to_evaluate ))"



printf '%s' 'bc: '

printf '%sn' "$expression_to_evaluate" | bc



printf '%s' 'awk: '

awk -v expression_to_evaluate="$expression_to_evaluate" -- 'BEGIN{printf "%dn", expression_to_evaluate}'

Arithemtic Expansion: 15

bc: 15

awk: 12

Your Answer

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});