Summary - C basics

Combine main, printf and comments to write your first C program.

In this group we covered the building blocks of C:

Now solidify what you learned with two small combined tasks.

Exercise Write a two-line program

Write a C program with #include <stdio.h> and int main(void). Use \n in a printf call to print Hello and World on two lines.

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#include <stdio.h>

int main(void) {
    printf("Hello\nWorld");
    return 0;
}

Define two int variables (for example 3 and 4) and print Sum: 7 with printf. Use the %d specifier and the addition operator.

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#include <stdio.h>

int main(void) {
    int a = 3;
    int b = 4;
    printf("Sum: %d", a + b);
    return 0;
}

Complete the specifier

printf("Result: ____", 5);

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printf("Result: %d", 5);