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IncrementDecrement.txt
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IncrementDecrement.txt
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Incrementing a variable using the pre-increment operator
int a = 5;
int b = ++a;
System.out.println(a);
System.out.println(b);
Output:
6
6
-------------------------------------------------------------------
Question 2
Incrementing a variable using the post-increment operator
int a = 5;
int b = a++;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
6
5
-------------------------------------------------------------------
Question 3
Decrementing a variable using the pre-decrement operator
int a = 5;
int b = --a;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
4
4
-------------------------------------------------------------------
Question 4
Decrementing a variable using the post-decrement operator
int a = 5;
int b = a--;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
4
5
-------------------------------------------------------------------
Question 5
Combining pre-increment and post-increment operators
int a = 5;
int b = ++a + a++;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
7
12
-------------------------------------------------------------------
Question 6
Combining pre-decrement and post-decrement operators
int a = 5;
int b = --a + a--;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
3
8
-------------------------------------------------------------------
Question 7
Using increment in a loop
int a = 0;
for (int i = 0; i < 5; ++i) {
a++;
}
System.out.println(a); // What is the value of 'a'?
Output:
5
-------------------------------------------------------------------
Question 8
Using decrement in a loop
int a = 10;
for (int i = 0; i < 5; i++) {
a--;
}
System.out.println(a); // What is the value of 'a'?
Output:
5
-------------------------------------------------------------------
Question 9
Complex increment operations
int a = 5;
a = a++ + ++a;
System.out.println(a); // What is the value of 'a'?
Output:
11
-------------------------------------------------------------------
Question 10
Combining increments and arithmetic operations
int a = 5;
int b = 3;
int c = a++ + ++b + b++ + ++a;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
System.out.println(c); // What is the value of 'c'?
Output:
7
5
20
-------------------------------------------------------------------
Question 11
Nested increment operations
int a = 1;
int b = 2;
int c = a++ + (++a * ++b);
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
System.out.println(c); // What is the value of 'c'?
Output:
3
3
10
-------------------------------------------------------------------
Question 12
Multiple pre-increments
int a = 1;
int b = ++a + ++a + ++a;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
4
9
-------------------------------------------------------------------
Question 13
Multiple post-increments
int a = 1;
int b = a++ + a++ + a++;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
4
6
-------------------------------------------------------------------
Question 14
Combining pre-decrement and pre-increment
int a = 5;
int b = 3;
int c = --a + ++b + a + b;
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
System.out.println(c); // What is the value of 'c'?
Output:
4
4
16
-------------------------------------------------------------------
Question 15
Complex decrement operations
int a = 5;
a = a-- - --a;
System.out.println(a); // What is the value of 'a'?
Output:
2
-------------------------------------------------------------------
Pre-increment and post-decrement in conditional statements
int a = 5;
if (++a > 5 && a-- < 7) {
a++;
}
System.out.println(a); // What is the value of 'a'?
Output:
6
-------------------------------------------------------------------
Post-increment in switch statement
int a = 5;
switch (a++) {
case 5: a += 10;
case 6: a += 20;
default: a += 30;
}
System.out.println(a); // What is the value of 'a'?
Output:
65
-------------------------------------------------------------------
Nested loops with increment
int a = 0;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
a++;
}
}
System.out.println(a); // What is the value of 'a'?
Output:
9
-------------------------------------------------------------------
Increment with logical operators
int a = 1;
int b = 1;
if (++a == 2 && b++ == 1) {
a++;
}
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
3
2
-------------------------------------------------------------------
Nested increments and decrements
int a = 5;
int b = 3;
int c = 0;
if (++a > b++) {
c = a-- + b++;
} else {
c = ++a - --b;
}
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
System.out.println(c); // What is the value of 'c'?
Output:
5
5
10
-------------------------------------------------------------------
Combining pre-increment and post-decrement in a loop
int a = 1;
int b = 2;
for (int i = 0; i < 3; ++i) {
a = a++ + --b;
}
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
1
-1
-------------------------------------------------------------------
Increment and decrement in a nested if-else
int a = 5;
int b = 3;
int c = 0;
if (++a > 6) {
if (--b > 2) {
c = a++ + --b;
} else {
c = --a - ++b;
}
} else {
c = a-- + ++b;
}
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
System.out.println(c); // What is the value of 'c'?
Output:
4
4
9
-------------------------------------------------------------------
Using nested increments in a loop
int a = 1;
for (int i = 0; i < 3; ++i) {
a += a++ + i;
}
System.out.println(a); // What is the value of 'a'?
Output:
12
-------------------------------------------------------------------
Multiple pre-increments in nested conditionals
int a = 5;
int b = 3;
int c = 0;
if (++a > 6) {
if (--b > 2) {
c = a-- + --b;
} else {
c = --a - ++b;
}
} else {
c = a++ + ++b;
}
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
System.out.println(c); // What is the value of 'c'?
Output:
7
4
10
-------------------------------------------------------------------
Increment and decrement in a switch statement
int a = 5;
int b = 0;
switch (++a) {
case 6:
b += a++;
break;
case 7:
b -= --a;
break;
default:
b = a;
}
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
Output:
7
6
-------------------------------------------------------------------
Increment and decrement in nested loops
int a = 0;
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 2; ++j) {
a += a++ + i + j;
}
}
System.out.println(a); // What is the value of 'a'?
Output:
39
-------------------------------------------------------------------
Complex increment and decrement in a loop
int a = 1;
for (int i = 0; i < 3; ++i) {
a = a++ + i;
a = a-- - i;
}
System.out.println(a); // What is the value of 'a'?
Output:
1
------------------------------------------------------------------------
Using pre-increment and post-decrement in nested conditionals
int a = 5;
int b = 3;
int c = 0;
if (++a > 6) {
if (--b > 2) {
c = a-- + --b;
} else {
c = --a - ++b;
}
} else {
c = a++ + ++b;
}
System.out.println(a); // What is the value of 'a'?
System.out.println(b); // What is the value of 'b'?
System.out.println(c); // What is the value of 'c'?
Output:
7
4
10
-------------------------------------------------------------------
Nested increments and decrements in a loop
int a = 0;
for (int i = 0; i < 3; ++i) {
a += ++a + i--;
}
System.out.println(a); // What is the value of 'a'?
Output:
18