JavaScript『条件分岐・繰返し』（構文）

(if(score>90){alert('foo');}else if(score>50){ alert('bar');}else{alert('baz');})

if(score>90){alert('foo');}else if(score>50){ alert('bar');}else{alert('baz');}

((age<18)?alert('boy'):alert('man');)

(age<18)?alert('boy'):alert('man');

(switch(n%2)case(0):alert('even');break; case(1):alert('odd');break;default:alert('?');break;})

switch(n%2)case(0):alert('even');break; case(1):alert('odd');break;default:alert('?');break;}

(let n=0; while(n<5){console.log(n);n++;})

let n=0; while(n<5){console.log(n);n++;}

(let n=0; do{console.log(n);n++;}while(n<5);)

let n=0; do{console.log(n);n++;}while(n<5);

(for(let i=10;i>0;i--){ document.write(i);})

for(let i=10;i>0;i--){ document.write(i);}

(for(let i=1;i<10;i++) {if(i===6){break;}console.log(i);})

for(let i=1;i<10;i++) {if(i===6){break;}console.log(i);}

(for(let i=0;i<10;i++) {if(i%2===1){continue;}console.log(i);})

for(let i=0;i<10;i++) {if(i%2===1){continue;}console.log(i);}

(const obj={a:1,b:2,c:3}; for(let key in obj){console.log(key)};)

const obj={a:1,b:2,c:3}; for(let key in obj){console.log(key)};