Questions and Answers
What is the output of System.out.print( Math.pow( 4, 2) )?
What is the output of System.out.println( Math.ceil( 5.1 ) )?
What is the output of System.out.println( Math.floor( 8.9 ) )?
What is the output of System.out.println( Math.sqrt( 49 ) )?
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What is the output of System.out.println( Math.round( 12.34 ) )?
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What is the output of System.out.println( Math.round( 12.56 ) )?
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What is the output of System.out.println( Math.max( 7, 3 ) )?
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What is the output of System.out.println( Math.min( 7, 3 ) )?
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What is the output of System.out.println( Math.max( 2.3, 5.6 ) )?
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What is the output of System.out.println( Math.min( 2.3, 5.6 ) )?
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What is the output of System.out.println( Math.abs(-213) )?
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What is the output of System.out.println( Math.abs(213) )?
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What is the output of System.out.println( Math.ceil( Math.sqrt(17) ) )?
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What is the range of Math.random()?
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What is the range of Math.random() * 10?
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What is the range of Math.random() * 20 + 10?
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Study Notes
Java Math Class Overview
- Math.pow(4, 2) computes 4 raised to the power of 2, resulting in 16.0.
- Math.ceil(5.1) rounds a number up to the nearest integer, resulting in 6.0.
- Math.floor(8.9) rounds a number down to the nearest integer, resulting in 8.0.
Square Root and Rounding Functions
- Math.sqrt(49) calculates the square root of 49, resulting in 7.0.
- Math.round(12.34) rounds 12.34 to the nearest integer, resulting in 12.
- Math.round(12.56) rounds 12.56 to the nearest integer, resulting in 13.
Max and Min Functions
- Math.max(7, 3) returns the greater of the two values, which is 7.
- Math.min(7, 3) returns the lesser of the two values, which is 3.
- Math.max(2.3, 5.6) compares two double values and returns the larger one, 5.6.
- Math.min(2.3, 5.6) compares two double values and returns the smaller one, 2.3.
Absolute Value Function
- Math.abs(-213) returns the absolute value of -213, resulting in 213.
- Math.abs(213) returns the absolute value of 213, which is also 213.
Random Number Generation
- Math.random() generates a random number in the range [0.0, 1.0).
- Math.random() * 10 produces a random number in the range [0.0, 10.0).
- Math.random() * 20 + 10 generates a random number in the range [10.0, 30.0).
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Description
Test your knowledge of the Java Math class with these flashcards. Each card includes a coding example demonstrating specific Math methods like pow, ceil, and floor. Perfect for students looking to enhance their understanding of mathematical operations in Java programming.
