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Questions and Answers
What is the purpose of a field-width specifier in a C program?
What is the purpose of a field-width specifier in a C program?
In the statement printf("Area = %4d", area);, what does the '4' represent?
In the statement printf("Area = %4d", area);, what does the '4' represent?
If the value of the variable 'area' is 8 and the format specifier is printf("%4d", area);, how many spaces will be padded before 8 on the screen?
If the value of the variable 'area' is 8 and the format specifier is printf("%4d", area);, how many spaces will be padded before 8 on the screen?
Why are there two extra spaces before 25 in the output 'Area = 0025'?
Why are there two extra spaces before 25 in the output 'Area = 0025'?
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What does the 'd' in %4d signify in the printf statement?
What does the 'd' in %4d signify in the printf statement?
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What does the last row of the table demonstrate about C?
What does the last row of the table demonstrate about C?
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What should be noted when formatting floating point numbers?
What should be noted when formatting floating point numbers?
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What is the general form for the format specifier of a floating point value?
What is the general form for the format specifier of a floating point value?
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What does it mean when a zero is always printed before the decimal point in numbers smaller than zero?
What does it mean when a zero is always printed before the decimal point in numbers smaller than zero?
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In the statement printf ("Height = 6.2f", height);, what does '6' represent?
In the statement printf ("Height = 6.2f", height);, what does '6' represent?
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Study Notes
Field Width Specifier in C Programming
- The field-width specifier in a C program determines the minimum number of characters to be printed out.
printf Statement
- In the statement
printf("Area = %4d", area);, the '4' represents the minimum field width, specifying that the output should be at least 4 characters wide.
Field Width and Padding
- If the value of the variable 'area' is 8 and the format specifier is
printf("%4d", area);, two spaces will be padded before the 8 on the screen to ensure the output is at least 4 characters wide.
Output Formatting
- The output 'Area = 0025' demonstrates that two extra spaces are added before 25 because of the specified minimum field width.
Format Specifier in printf
- The 'd' in
%4dsignifies that the argument is an integer to be printed as a decimal value.
C Programming
- The last row of the table demonstrates that C can format output values to a specified width.
Floating Point Number Formatting
- When formatting floating point numbers, note that the precision value specifies the number of digits after the decimal point.
Format Specifier for Floating Point Values
- The general form for the format specifier of a floating point value is
%m.nf, wheremis the minimum field width andnis the precision.
Zero Padding for Smaller Numbers
- When a zero is always printed before the decimal point in numbers smaller than one, it indicates zero padding.
printf Statement with Floating Point Value
- In the statement
printf ("Height = 6.2f", height);, the '6' represents the precision specifier, indicating that the output should have a precision of 2 digits after the decimal point.
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Description
Learn how to use field-width specifiers in C programming to define the number of columns used to display a value on the screen. Understand how to format integers by adding a number between the % and d in the printf format string.
