JavaScript『関数』

(function info(){console.log('Hi!')}; info();)

function info(){console.log('Hi!')}; info();

(const add=function(a,b){return a+b;}; add(4,5);)

const add=function(a,b){return a+b;}; add(4,5);

(const arrow=()=>{};)

const arrow=()=>{};

(const multiply=x=>x*10; multiply(10);)

const multiply=x=>x*10; multiply(10);

(function add(a,b){function square(x){return x*x;} return square(a)+square(b);};add(10,20);)

function add(a,b){function square(x){return x*x;} return square(a)+square(b);};add(10,20);

(function loop(x){if(x<=0)return;loop(x-1); console.log(x);};loop(5);)

function loop(x){if(x<=0)return;loop(x-1); console.log(x);};loop(5);

(function foo(n){if(n<=1){return 1;} return (n*foo(n-1));}console.log(foo(4));)

function foo(n){if(n<=1){return 1;} return (n*foo(n-1));}console.log(foo(4));

(const loop=x=>{if(x>=10)return; loop(x+1);console.log(x);};loop(5);)

const loop=x=>{if(x>=10)return; loop(x+1);console.log(x);};loop(5);

(const cbf=function(){alert('callback function');}; setTimeout(cbf,1000);)

const cbf=function(){alert('callback function');}; setTimeout(cbf,1000);

(const calculation=function(a=5){return a*a;}; calculation();)

const calculation=function(a=5){return a*a;}; calculation();

(function foo(x,y){return(x+y);} console.log(foo.length);)

function foo(x,y){return(x+y);} console.log(foo.length);

(function foo(...x){console.log(x);} foo(1,2,3,4);)

function foo(...x){console.log(x);} foo(1,2,3,4);

((function(n){return(n*n);}(10));)

(function(n){return(n*n);}(10));