Why is execSync not working in my code?
<p>I'm trying out various child process methods in nodejs. So to execute a linux command, I tried this code, where it prints the current working directory:</p>

<pre><code>var execSync = require('child_process').execSync;

function commandOutput(error, stdout, stderr) {
    if (stderr !== null) {
        console.error(stderr);
    }
    if (error !== null) {
        console.error('execution error: ' + error);
    }
    if (stdout)console.log(stdout); 
    console.log("done");
}

var commandToExecute = "pwd";
execSync(commandToExecute, commandOutput);

console.log("executed");
</code></pre>

<p>While this works fine if I replace execSync with exec, the above code, i.e, with execSync gives the following error:</p>

<pre>
execSync(commandToExecute, commandOutput);
^
TypeError: undefined is not a function
    at Object. (/home/User_Name/fil.js:24:1)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:902:3
</pre>

<p>Why is this happening? What should I change for this to work?</p>