Section 1.5.3 Line Counting

Program

#include <stdio.h>
/* count lines in input */
main()
{
    int c, nl;
    nl = 0;
    while ((c = getchar()) != EOF)
        if (c == '\n')
            ++nl;
        printf("%d\n", nl);
    }

Explanation

This Program counts input lines. The program does that counting by setting a variable nl to 0 in the beginning. As the program one character at a time in the while loop ((c = getchar()) != EOF) till the EOF. If the character is newline character ‘n’ the number of lines variable is incremented, ++nl. At the end, the number of lines, nl, is printed.

See also

• Suggest a Code Improvement: sec_1.5.3_line_counting.c

• Suggest a better explanation for sec_1.5.3_line_counting.rst

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This document was updated on 20 May of 22

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Section 1.5.2 Character Counting2

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Exercise 1.8 - Count blanks, tabs and newlines