Maturity value at Compound Interest

Java program to convert Decimal to Binary

 import java.util.Scanner;

class D2B

{

public static void main(String[] args)

{

System.out.print("Enter a decimal number :");

Scanner sc = new Scanner(System.in);

int num = sc.nextInt();

String binary = "";

while(num/2 > 0)

{

binary = num%2 + binary;

num = num/2;

}

binary = 1 + binary;

System.out.print(binary);

}

}

Output:

java string value + int is a string or not?

When a Java String value is concatenated with an int value using the + operator, the result is a String. 

This behavior is due to Java's rules for the + operator: 

1. If either operand is a String, the other operand is automatically converted to its string representation (e.g., the integer 10 becomes "10").
2. The operator then performs string concatenation. 

Example:

 String value = "The answer is: ";

int number = 42;

String result = value + number;

// The value of 'result' will be the string "The answer is: 42"

Python Dictionary

 

Removing Dictionary Items

Dictionary items can be removed using built-in deletion methods that work on keys:

• del: removes an item using its key
• pop(): removes the item with the given key and returns its value
• clear(): removes all items from the dictionary
• popitem(): removes and returns the last inserted key–value pair

d = {1: 'Geeks', 2: 'For', 3: 'Geeks', 'age':22}

​

# Using del 

del d["age"]

print(d)

​

# Using pop() 

val = d.pop(1)

print(val)

​

# Using popitem()

key, val = d.popitem()

print(f"Key: {key}, Value: {val}")

​

# Using clear()

d.clear()

print(d)

Output

{1: 'Geeks', 2: 'For', 3: 'Geeks'}
Geeks
Key: 3, Value: Geeks
{}

Iterating Through a Dictionary

A dictionary can be traversed using a for loop to access its keys, values or both key-value pairs by using the built-in methods keys(), values() and items().

d = {1: 'Geeks', 2: 'For', 'age':22}

​

# Iterate over keys

for key in d:

    print(key)

​

# Iterate over values

for value in d.values():

    print(value)

​

# Iterate over key-value pairs

for key, value in d.items():

    print(f"{key}: {value}")

Output

1
2
age
Geeks
For
22
1: Geeks
2: For
age: 22