The primary use of a calculator is to perform mathematical calculations with speed and accuracy. Calculators can handle a wide range of mathematical operations, including addition, subtraction, multiplication, and division, as well as complex functions such as trigonometry, logarithms, and exponentiation in scientific calculators. They are widely used in various fields, including education, engineering, finance, and everyday life for tasks ranging from simple arithmetic to advanced calculations. With the advent of technology, calculators have evolved from simple handheld devices to sophisticated software applications available on computers and smartphones, further enhancing their accessibility and utility.