Java Programs

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Introduction to Java

Convert integer to float and vice-versa - Java Program

Below are two Java programs:
Convert integer → float
Convert float → integer

Program 1: Convert Integer to Float

public class IntToFloat {
    public static void main(String[] args) {
         int num = 25;
         // Converting int to float
        float f = (float) num;
 
        System.out.println("Integer value: " + num);
        System.out.println("Converted float value: " + f);
    }
}
 

 
OUTPUT 1:
Integer value: 25
Converted float value: 25.0

Explanation

Step 1: Assign an integer

int num = 25;

Step 2: Convert integer to float

float f = (float) num;

• Java automatically allows widening conversion
• int → float is safe
• The decimal “.0” is added automatically

Step 3: Print both values

Shows original and converted values.

Program 2: Convert Float to Integer

public class FloatToInt {
    public static void main(String[] args) {
         float f = 12.75f;
         // Converting float to int
        int num = (int) f;
 
        System.out.println("Float value: " + f);
        System.out.println("Converted integer value: " + num);
    }
}

 
OUTPUT 1:
Float value: 12.75
Converted integer value: 12

Explanation

Step 1: Assign a float

float f = 12.75f;

Step 2: Convert float to int

int num = (int) f;

• This is narrowing conversion
• Fractional part is truncated, not rounded
• So 12.75 → 12

Step 3: Print both values

Combined Understanding