Category Archives: Basic C Programs C Source Code

C Program Convert String Upper Case

C Program Convert String Upper Case /* C Program to convert given string into lower case */ #include <stdio.h> #include <string.h> int main() { char str[100]; printf(“Please, input a string to convert to lower case\n”); gets(str); printf(“The string in lower case is: %s\n”, strlwr(str)); return 0; } Output Please, input a string to convert to… Read More »

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C Program Convert String Lower Case

C Program Convert String Lower Case /* C Program to convert given string into lower case */ #include <stdio.h> #include <string.h> int main() { char str[100]; printf(“Please, input a string to convert to lower case\n”); gets(str); printf(“The string in lower case is: %s\n”, strlwr(str)); return 0; } Output Please, input a string to convert to… Read More »

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C Program Find String Length

C Program Find String Length /* C program to calculate and print length of given string without using built-in function. */ #include<stdio.h> #include<string.h> int main() { int i,length; char str[100]; printf("Enter a String to find its length:"); gets(str); i=0; while(str[i]!='\0') i++; printf("Using own code, The length of string '%s' is = %d",str,i); printf("\nUsing Predefined Function… Read More »

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C Program Sum Series N Natural Numbers

C Program Sum Series N Natural Numbers /* C program to calculate and print sum of the series 1+2+3+4+…+n C program to print the sum of all natural numbers from 1 to n. */ #include<stdio.h> int main() { int i,n,sum; printf(“Enter the value of n: “); scanf(“%d”,&n); sum=0; /* loop to calculate sum from 1… Read More »

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