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if_statement.js
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let a = 42;
let b = null;
if (a === 42) {
b = "success block!";
}
console.assertEqual(b, "success block!");
let c = undefined;
if (a !== 42) {
c = "success block!";
}
console.assertEqual(c, undefined);
let d;
if (a === 42) {
d = "success block!";
} else {
d = "else block!";
}
console.assertEqual(d, "success block!");
let e;
if (a !== 42) {
e = "success block!";
} else {
e = "else block!";
}
console.assertEqual(e, "else block!");
let f;
if (a === 42) {
f = "success block!";
} else if (a === 43) {
f = "else-if block!";
} else {
f = "else block!";
}
console.assertEqual(f, "success block!");
let g;
if (a === 41) {
g = "success block!";
} else if (a === 42) {
g = "else-if block!";
} else {
g = "else block!";
}
console.assertEqual(g, "else-if block!");
let h;
if (a === 41) {
h = "success block!";
} else if (a === 43) {
h = "else-if block!";
} else {
h = "else block!";
}
console.assertEqual(h, "else block!");
let i;
if (a === 42) {
i = "success block!";
} else {
if (a === 43) {
i = "nested if block!";
} else {
i = "nested else block!";
}
}
console.assertEqual(i, "success block!");
let j;
if (a === 41) {
j = "success block!";
} else {
if (a === 42) {
j = "nested if block!";
} else {
j = "nested else block!";
}
}
console.assertEqual(j, "nested if block!");
let k;
if (a === 41) {
k = "success block!";
} else {
if (a === 43) {
k = "nested if block!";
} else {
k = "nested else block!";
}
}
console.assertEqual(k, "nested else block!");